First implementation
This commit is contained in:
adrien
+795
@@ -0,0 +1,795 @@
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const std = @import("std");
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const hlp = @import("helper.zig");
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const Scales = @import("Scales.zig");
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const UnitScale = Scales.UnitScale;
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const Dimensions = @import("Dimensions.zig");
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const Dimension = Dimensions.Dimension;
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pub fn Quantity(T: type, d: Dimensions, s: Scales) type {
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return struct {
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value: T,
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const Self = @This();
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pub const Vec3: type = QuantityVec3(Self);
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pub const ValueType: type = T;
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pub const dims: Dimensions = d;
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pub const scales = s;
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/// Internal helper to convert any supported T to f64 for math
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fn toF64(val: anytype) f64 {
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const TIn = @TypeOf(val);
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return switch (@typeInfo(TIn)) {
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.int => @floatFromInt(val),
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.float => @floatCast(val),
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else => @compileError("Unsupported type for Quantity"),
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};
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}
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/// Internal helper to convert f64 back to the target T
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fn fromF64(val: f64) T {
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return switch (@typeInfo(T)) {
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.int => @intFromFloat(@round(val)),
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.float => @floatCast(val),
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else => unreachable,
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};
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}
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/// Helper for integer power of 10 at comptime
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fn pow10(comptime exp: i32) T {
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var res: T = 1;
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var i: i32 = 0;
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const abs_exp = if (exp < 0) -exp else exp;
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while (i < abs_exp) : (i += 1) res *= 10;
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return res;
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}
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pub fn add(self: Self, rhs: anytype) Self {
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if (comptime !dims.eql(@TypeOf(rhs).dims))
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@compileError("Dimension mismatch in add");
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return .{ .value = self.value + rhs.to(Self).value };
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}
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pub fn sub(self: Self, rhs: anytype) Self {
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if (comptime !dims.eql(@TypeOf(rhs).dims))
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@compileError("Dimension mismatch in sub");
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return .{ .value = self.value - rhs.to(Self).value };
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}
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pub fn mulBy(self: Self, rhs: anytype) Quantity(
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T,
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dims.add(@TypeOf(rhs).dims),
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scales.min(@TypeOf(rhs).scales),
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) {
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const self_ = self.to(Quantity(T, dims, scales.min(@TypeOf(rhs).scales)));
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const rhs_ = rhs.to(Quantity(T, @TypeOf(rhs).dims, scales.min(@TypeOf(rhs).scales)));
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return .{ .value = self_.value * rhs_.value };
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}
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pub fn divBy(self: Self, rhs: anytype) Quantity(
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T,
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dims.sub(@TypeOf(rhs).dims),
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scales.min(@TypeOf(rhs).scales),
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) {
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const self_ = self.to(Quantity(T, dims, scales.min(@TypeOf(rhs).scales)));
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const rhs_ = rhs.to(Quantity(T, @TypeOf(rhs).dims, scales.min(@TypeOf(rhs).scales)));
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return .{ .value = fromF64((toF64(self_.value) / toF64(rhs_.value))) };
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}
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pub fn scale(self: Self, sc: T) Self {
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return .{ .value = self.value * sc };
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}
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pub fn to(self: Self, comptime Dest: type) Dest {
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if (comptime !dims.eql(Dest.dims))
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@compileError("Dimension mismatch: " ++ dims.str() ++ " vs " ++ Dest.dims.str());
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if (comptime @TypeOf(self) == Dest)
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return self;
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const source_factor = scales.getFactor(dims);
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const dest_factor = Dest.scales.getFactor(Dest.dims);
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const ratio = source_factor / dest_factor;
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const result_f = toF64(self.value) * ratio;
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const DestT = Dest.ValueType;
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return .{ .value = switch (@typeInfo(DestT)) {
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.int => @intFromFloat(@round(result_f)),
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.float => @floatCast(result_f),
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else => unreachable,
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} };
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}
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pub fn vec3(self: Self) Vec3 {
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return .{ .x = self.value, .y = self.value, .z = self.value };
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}
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pub fn format(
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self: Self,
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writer: *std.Io.Writer,
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) !void {
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try writer.print("{d}", .{self.value});
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var iter = std.EnumSet(Dimension).initFull().iterator();
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var first = true;
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while (iter.next()) |bu| {
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const v = dims.get(bu);
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if (v == 0) continue;
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if (!first)
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try writer.writeAll(".");
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first = false;
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const uscale = scales.get(bu);
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if (bu == .T and (uscale == .min or uscale == .hour or uscale == .year))
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try writer.print("{s}", .{uscale.str()})
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else
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try writer.print("{s}{s}", .{ uscale.str(), bu.unit() });
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if (v != 1)
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try hlp.printSuperscript(writer, v);
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}
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}
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};
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}
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pub fn QuantityVec3(Q: type) type {
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const T = Q.ValueType;
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const d: Dimensions = Q.dims;
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const s: Scales = Q.scales;
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return struct {
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x: T,
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y: T,
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z: T,
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const Self = @This();
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pub const QuantityType = Q;
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pub const ValueType = T;
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pub const dims: Dimensions = d;
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pub const scales = s;
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pub const zero = Self{ .x = 0, .y = 0, .z = 0 };
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pub const one = Self{ .x = 1, .y = 1, .z = 1 };
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pub fn initDefault(v: T) Self {
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return .{ .x = v, .y = v, .z = v };
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}
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pub fn add(self: Self, rhs: anytype) Self {
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const Tr = @TypeOf(rhs);
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return .{
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.x = (Q{ .value = self.x }).add(Tr.QuantityType{ .value = rhs.x }).value,
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.y = (Q{ .value = self.y }).add(Tr.QuantityType{ .value = rhs.y }).value,
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.z = (Q{ .value = self.z }).add(Tr.QuantityType{ .value = rhs.z }).value,
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};
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}
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pub fn sub(self: Self, rhs: anytype) Self {
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const Tr = @TypeOf(rhs);
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return .{
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.x = (Q{ .value = self.x }).sub(Tr.QuantityType{ .value = rhs.x }).value,
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.y = (Q{ .value = self.y }).sub(Tr.QuantityType{ .value = rhs.y }).value,
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.z = (Q{ .value = self.z }).sub(Tr.QuantityType{ .value = rhs.z }).value,
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};
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}
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pub fn divBy(
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self: Self,
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rhs: anytype,
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) QuantityVec3(Quantity(T, d.sub(@TypeOf(rhs).dims), s.min(@TypeOf(rhs).scales))) {
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const Tr = @TypeOf(rhs);
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return .{
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.x = (Q{ .value = self.x }).divBy(Tr.QuantityType{ .value = rhs.x }).value,
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.y = (Q{ .value = self.y }).divBy(Tr.QuantityType{ .value = rhs.y }).value,
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.z = (Q{ .value = self.z }).divBy(Tr.QuantityType{ .value = rhs.z }).value,
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};
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}
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pub fn mulBy(
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self: Self,
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rhs: anytype,
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) QuantityVec3(Quantity(T, d.sub(@TypeOf(rhs).dims), s.min(@TypeOf(rhs).scales))) {
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const Tr = @TypeOf(rhs);
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return .{
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.x = (Q{ .value = self.x }).mulBy(Tr.QuantityType{ .value = rhs.x }).value,
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.y = (Q{ .value = self.y }).mulBy(Tr.QuantityType{ .value = rhs.y }).value,
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.z = (Q{ .value = self.z }).mulBy(Tr.QuantityType{ .value = rhs.z }).value,
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};
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}
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pub fn divByScalar(
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self: Self,
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scalar: anytype,
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) QuantityVec3(Quantity(T, d.sub(@TypeOf(scalar).dims), s.min(@TypeOf(scalar).scales))) {
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const q_x = Q{ .value = self.x };
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const q_y = Q{ .value = self.y };
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const q_z = Q{ .value = self.z };
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return .{
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.x = q_x.divBy(scalar).value,
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.y = q_y.divBy(scalar).value,
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.z = q_z.divBy(scalar).value,
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};
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}
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pub fn mulByScalar(
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self: Self,
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scalar: anytype,
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) QuantityVec3(Quantity(T, d.add(@TypeOf(scalar).dims), s.min(@TypeOf(scalar).scales))) {
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const q_x = Q{ .value = self.x };
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const q_y = Q{ .value = self.y };
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const q_z = Q{ .value = self.z };
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return .{
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.x = q_x.mulBy(scalar).value,
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.y = q_y.mulBy(scalar).value,
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.z = q_z.mulBy(scalar).value,
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};
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}
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pub fn negate(self: Self) Self {
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return .{ .x = -self.x, .y = -self.y, .z = -self.z };
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}
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pub fn scale(self: Self, rhs: T) Self {
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return .{
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.x = (Q{ .value = self.x }).scale(rhs).value,
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.y = (Q{ .value = self.y }).scale(rhs).value,
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.z = (Q{ .value = self.z }).scale(rhs).value,
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};
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}
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pub fn to(self: Self, comptime DestQ: type) QuantityVec3(DestQ) {
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return .{
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.x = (Q{ .value = self.x }).to(DestQ).value,
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.y = (Q{ .value = self.y }).to(DestQ).value,
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.z = (Q{ .value = self.z }).to(DestQ).value,
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};
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}
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pub fn format(self: Self, writer: *std.Io.Writer) !void {
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try writer.print("({d:.2}, {d:.2}, {d:.2})", .{ self.x, self.y, self.z });
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var iter = std.EnumSet(Dimension).initFull().iterator();
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var first = true;
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while (iter.next()) |bu| {
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const v = dims.get(bu);
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if (v == 0) continue;
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if (!first) try writer.writeAll(".");
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first = false;
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try writer.print("{s}{s}", .{ scales.get(bu).str(), bu.unit() });
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if (v != 1) try hlp.printSuperscript(writer, v);
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}
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}
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pub fn lengthSqr(self: Self) T {
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return self.x * self.x + self.y * self.y + self.z * self.z;
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}
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pub fn length(self: Self) T {
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if (comptime hlp.isInt(T))
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return self.isqrt()
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else
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return @sqrt(self.x * self.x + self.y * self.y + self.z * self.z);
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}
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fn isqrt(self: Self) T {
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const squared_sum = (self.x * self.x) + (self.y * self.y) + (self.z * self.z);
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if (squared_sum <= 0) return 0;
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var x = squared_sum;
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var y = @divTrunc(x + 1, 2);
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while (y < x) {
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x = y;
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y = @divTrunc(x + @divTrunc(squared_sum, x), 2);
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}
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return x;
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}
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};
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}
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pub fn main(_: std.process.Init) void {}
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test "Generate quantity" {
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const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = -3 }));
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const Second = Quantity(f32, Dimensions.init(.{ .T = 1 }), Scales.init(.{ .T = .n }));
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const distance = Meter{ .value = 10 };
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const time = Second{ .value = 2 };
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try std.testing.expectEqual(10, distance.value);
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try std.testing.expectEqual(2, time.value);
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}
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test "Add" {
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const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
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const distance = Meter{ .value = 10 };
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const distance2 = Meter{ .value = 20 };
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const added = distance.add(distance2);
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try std.testing.expectEqual(30, added.value);
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try std.testing.expectEqual(1, @TypeOf(added).dims.get(.L));
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std.debug.print("KiloMeter {f} + {f} = {f} OK\n", .{ distance, distance2, added });
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const KiloMeter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .k }));
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const distance3 = KiloMeter{ .value = 2 };
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const added2 = distance.add(distance3);
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try std.testing.expectEqual(2010, added2.value);
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try std.testing.expectEqual(1, @TypeOf(added2).dims.get(.L));
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std.debug.print("KiloMeter {f} + {f} = {f} OK\n", .{ distance, distance3, added2 });
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const added3 = distance3.add(distance);
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try std.testing.expectEqual(2, added3.value);
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try std.testing.expectEqual(1, @TypeOf(added3).dims.get(.L));
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std.debug.print("KiloMeter {f} + {f} = {f} OK\n", .{ distance3, distance, added3 });
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const KiloMeter_f = Quantity(f64, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .k }));
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const distance4 = KiloMeter_f{ .value = 2 };
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const added4 = distance4.add(distance);
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try std.testing.expectEqual(2.01, added4.value);
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try std.testing.expectEqual(1, @TypeOf(added4).dims.get(.L));
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std.debug.print("KiloMeter_f {f} + {f} = {f} OK\n", .{ distance4, distance, added4 });
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}
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test "Sub" {
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const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
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const KiloMeter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .k }));
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const KiloMeter_f = Quantity(f64, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .k }));
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const a = Meter{ .value = 500 };
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const b = Meter{ .value = 200 };
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const diff = a.sub(b);
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try std.testing.expectEqual(300, diff.value);
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std.debug.print("Sub: {f} - {f} = {f} OK\n", .{ a, b, diff });
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const km = KiloMeter{ .value = 1 };
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const diff2 = a.sub(km);
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std.debug.print("Sub cross-scale: {f} - {f} = {f}\n", .{ a, km, diff2 });
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const km_f = KiloMeter_f{ .value = 2.5 };
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const m_f = Meter{ .value = 500 };
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const diff3 = km_f.sub(m_f);
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try std.testing.expectApproxEqAbs(@as(f32, 2.0), diff3.value, 1e-4);
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std.debug.print("Sub float cross-scale: {f} - {f} = {f} OK\n", .{ km_f, m_f, diff3 });
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}
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test "MulBy" {
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const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
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const Second = Quantity(f32, Dimensions.init(.{ .T = 1 }), Scales.init(.{}));
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const d = Meter{ .value = 3.0 };
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const t = Second{ .value = 4.0 };
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const area_time = d.mulBy(t);
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try std.testing.expectEqual(12, area_time.value);
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try std.testing.expectEqual(1, @TypeOf(area_time).dims.get(.L));
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try std.testing.expectEqual(1, @TypeOf(area_time).dims.get(.T));
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std.debug.print("MulBy: {f} * {f} = {f} OK\n", .{ d, t, area_time });
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const d2 = Meter{ .value = 5.0 };
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const area = d.mulBy(d2);
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try std.testing.expectEqual(15, area.value);
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try std.testing.expectEqual(2, @TypeOf(area).dims.get(.L));
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try std.testing.expectEqual(0, @TypeOf(area).dims.get(.T));
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std.debug.print("MulBy: {f} * {f} = {f} OK\n", .{ d, d2, area });
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}
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test "MulBy with scale" {
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const KiloMeter = Quantity(f32, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .k }));
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const KiloGram = Quantity(f32, Dimensions.init(.{ .M = 1 }), Scales.init(.{ .M = .k }));
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const dist = KiloMeter{ .value = 2.0 };
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const mass = KiloGram{ .value = 3.0 };
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const prod = dist.mulBy(mass);
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try std.testing.expectEqual(1, @TypeOf(prod).dims.get(.L));
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try std.testing.expectEqual(1, @TypeOf(prod).dims.get(.M));
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std.debug.print("MulBy scaled: {f} * {f} = {f} OK\n", .{ dist, mass, prod });
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}
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test "MulBy with type change" {
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const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .k }));
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const Second = Quantity(f32, Dimensions.init(.{ .T = 1 }), Scales.init(.{}));
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const KmSec = Quantity(f32, Dimensions.init(.{ .L = 1, .T = 1 }), Scales.init(.{ .L = .k }));
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const d = Meter{ .value = 3.0 };
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const t = Second{ .value = 4.0 };
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const area_time = d.mulBy(t).to(KmSec);
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try std.testing.expectEqual(12, area_time.value);
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try std.testing.expectEqual(1, @TypeOf(area_time).dims.get(.L));
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try std.testing.expectEqual(1, @TypeOf(area_time).dims.get(.T));
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std.debug.print("MulBy: {f} * {f} = {f} OK\n", .{ d, t, area_time });
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}
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test "MulBy small" {
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const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .n }));
|
||||
const Second = Quantity(f32, Dimensions.init(.{ .T = 1 }), Scales.init(.{}));
|
||||
|
||||
const d = Meter{ .value = 3.0 };
|
||||
const t = Second{ .value = 4.0 };
|
||||
|
||||
const area_time = d.mulBy(t);
|
||||
try std.testing.expectEqual(12, area_time.value);
|
||||
try std.testing.expectEqual(1, @TypeOf(area_time).dims.get(.L));
|
||||
try std.testing.expectEqual(1, @TypeOf(area_time).dims.get(.T));
|
||||
std.debug.print("MulBy: {f} * {f} = {f} OK\n", .{ d, t, area_time });
|
||||
}
|
||||
|
||||
test "Scale" {
|
||||
const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
const Second = Quantity(f32, Dimensions.init(.{ .T = 1 }), Scales.init(.{}));
|
||||
|
||||
const d = Meter{ .value = 7 };
|
||||
const scaled = d.scale(3);
|
||||
try std.testing.expectEqual(21, scaled.value);
|
||||
try std.testing.expectEqual(1, @TypeOf(scaled).dims.get(.L));
|
||||
std.debug.print("Scale int: {f} * 3 = {f} OK\n", .{ d, scaled });
|
||||
|
||||
const t = Second{ .value = 1.5 };
|
||||
const scaled_f = t.scale(4.0);
|
||||
try std.testing.expectApproxEqAbs(@as(f32, 6.0), scaled_f.value, 1e-4);
|
||||
std.debug.print("Scale float: {f} * 4 = {f} OK\n", .{ t, scaled_f });
|
||||
}
|
||||
|
||||
test "Chained: velocity and acceleration" {
|
||||
const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
const Second = Quantity(f32, Dimensions.init(.{ .T = 1 }), Scales.init(.{}));
|
||||
|
||||
const dist = Meter{ .value = 100.0 };
|
||||
const t1 = Second{ .value = 5.0 };
|
||||
const velocity = dist.divBy(t1);
|
||||
try std.testing.expectEqual(20, velocity.value);
|
||||
try std.testing.expectEqual(1, @TypeOf(velocity).dims.get(.L));
|
||||
try std.testing.expectEqual(-1, @TypeOf(velocity).dims.get(.T));
|
||||
|
||||
const t2 = Second{ .value = 4.0 };
|
||||
const accel = velocity.divBy(t2);
|
||||
try std.testing.expectEqual(5, accel.value);
|
||||
try std.testing.expectEqual(1, @TypeOf(accel).dims.get(.L));
|
||||
try std.testing.expectEqual(-2, @TypeOf(accel).dims.get(.T));
|
||||
|
||||
std.debug.print("Velocity: {f}, Acceleration: {f} OK\n", .{ velocity, accel });
|
||||
}
|
||||
|
||||
test "DivBy integer exact" {
|
||||
const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
const Second = Quantity(f32, Dimensions.init(.{ .T = 1 }), Scales.init(.{}));
|
||||
|
||||
const dist = Meter{ .value = 120 };
|
||||
const time = Second{ .value = 4 };
|
||||
const vel = dist.divBy(time);
|
||||
|
||||
try std.testing.expectEqual(30, vel.value);
|
||||
try std.testing.expectEqual(1, @TypeOf(vel).dims.get(.L));
|
||||
try std.testing.expectEqual(-1, @TypeOf(vel).dims.get(.T));
|
||||
std.debug.print("DivBy int: {f} / {f} = {f} OK\n", .{ dist, time, vel });
|
||||
}
|
||||
|
||||
test "Conversion chain: km -> m -> cm" {
|
||||
const KiloMeter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .k }));
|
||||
const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
const CentiMeter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .c }));
|
||||
|
||||
const km = KiloMeter{ .value = 15 };
|
||||
const m = km.to(Meter);
|
||||
const cm = m.to(CentiMeter);
|
||||
|
||||
try std.testing.expectEqual(15_000, m.value);
|
||||
try std.testing.expectEqual(1_500_000, cm.value);
|
||||
std.debug.print("Chain: {f} -> {f} -> {f} OK\n", .{ km, m, cm });
|
||||
}
|
||||
|
||||
test "Conversion: hours -> minutes -> seconds" {
|
||||
const Hour = Quantity(i128, Dimensions.init(.{ .T = 1 }), Scales.init(.{ .T = .hour }));
|
||||
const Minute = Quantity(i128, Dimensions.init(.{ .T = 1 }), Scales.init(.{ .T = .min }));
|
||||
const Second = Quantity(i128, Dimensions.init(.{ .T = 1 }), Scales.init(.{}));
|
||||
|
||||
const h = Hour{ .value = 1.0 };
|
||||
const min = h.to(Minute);
|
||||
const sec = min.to(Second);
|
||||
|
||||
try std.testing.expectEqual(60, min.value);
|
||||
try std.testing.expectEqual(3600, sec.value);
|
||||
std.debug.print("Time chain: {f} -> {f} -> {f} OK\n", .{ h, min, sec });
|
||||
}
|
||||
|
||||
test "Negative values" {
|
||||
const Meter = Quantity(i128, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
|
||||
const a = Meter{ .value = 5 };
|
||||
const b = Meter{ .value = 20 };
|
||||
const diff = a.sub(b);
|
||||
try std.testing.expectEqual(-15, diff.value);
|
||||
std.debug.print("Negative sub: {f} - {f} = {f} OK\n", .{ a, b, diff });
|
||||
}
|
||||
|
||||
test "Format Quantity" {
|
||||
const MeterPerSecondSq = Quantity(
|
||||
f32,
|
||||
Dimensions.init(.{ .L = 1, .T = -2 }),
|
||||
Scales.init(.{ .T = .n }),
|
||||
);
|
||||
const KgMeterPerSecond = Quantity(
|
||||
f32,
|
||||
Dimensions.init(.{ .M = 1, .L = 1, .T = -1 }),
|
||||
Scales.init(.{ .M = .k }),
|
||||
);
|
||||
|
||||
const accel = MeterPerSecondSq{ .value = 9.81 };
|
||||
const momentum = KgMeterPerSecond{ .value = 42.0 };
|
||||
|
||||
std.debug.print("Acceleration: {f}\n", .{accel});
|
||||
std.debug.print("Momentum: {f}\n", .{momentum});
|
||||
}
|
||||
|
||||
test "Format Vector3" {
|
||||
const MeterPerSecondSq = Quantity(
|
||||
f32,
|
||||
Dimensions.init(.{ .L = 1, .T = -2 }),
|
||||
Scales.init(.{ .T = .n }),
|
||||
);
|
||||
const KgMeterPerSecond = Quantity(
|
||||
f32,
|
||||
Dimensions.init(.{ .M = 1, .L = 1, .T = -1 }),
|
||||
Scales.init(.{ .M = .k }),
|
||||
);
|
||||
|
||||
const accel = MeterPerSecondSq.Vec3.initDefault(9.81);
|
||||
const momentum = KgMeterPerSecond.Vec3{ .x = 43, .y = 0, .z = 11 };
|
||||
|
||||
std.debug.print("Acceleration: {f}\n", .{accel});
|
||||
std.debug.print("Momentum: {f}\n", .{momentum});
|
||||
}
|
||||
|
||||
test "Vec3 Init and Basic Arithmetic" {
|
||||
const Meter = Quantity(i32, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
const Vec3M = Meter.Vec3;
|
||||
|
||||
// Test zero, one, initDefault
|
||||
const v_zero = Vec3M.zero;
|
||||
try std.testing.expectEqual(0, v_zero.x);
|
||||
|
||||
const v_one = Vec3M.one;
|
||||
try std.testing.expectEqual(1, v_one.x);
|
||||
|
||||
const v_def = Vec3M.initDefault(5);
|
||||
try std.testing.expectEqual(5, v_def.x);
|
||||
try std.testing.expectEqual(5, v_def.y);
|
||||
try std.testing.expectEqual(5, v_def.z);
|
||||
|
||||
// Test add and sub
|
||||
const v1 = Vec3M{ .x = 10, .y = 20, .z = 30 };
|
||||
const v2 = Vec3M{ .x = 2, .y = 4, .z = 6 };
|
||||
|
||||
const added = v1.add(v2);
|
||||
try std.testing.expectEqual(12, added.x);
|
||||
try std.testing.expectEqual(24, added.y);
|
||||
try std.testing.expectEqual(36, added.z);
|
||||
|
||||
const subbed = v1.sub(v2);
|
||||
try std.testing.expectEqual(8, subbed.x);
|
||||
try std.testing.expectEqual(16, subbed.y);
|
||||
try std.testing.expectEqual(24, subbed.z);
|
||||
|
||||
// Test negate
|
||||
const neg = v1.negate();
|
||||
try std.testing.expectEqual(-10, neg.x);
|
||||
try std.testing.expectEqual(-20, neg.y);
|
||||
try std.testing.expectEqual(-30, neg.z);
|
||||
}
|
||||
|
||||
test "Vec3 Kinematics (Scalar Mul/Div)" {
|
||||
const Meter = Quantity(i32, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
const Second = Quantity(i32, Dimensions.init(.{ .T = 1 }), Scales.init(.{}));
|
||||
const Vec3M = Meter.Vec3;
|
||||
|
||||
const pos = Vec3M{ .x = 100, .y = 200, .z = 300 };
|
||||
const time = Second{ .value = 10 };
|
||||
|
||||
// Vector divided by scalar Quantity (Velocity = Position / Time)
|
||||
const vel = pos.divByScalar(time);
|
||||
try std.testing.expectEqual(10, vel.x);
|
||||
try std.testing.expectEqual(20, vel.y);
|
||||
try std.testing.expectEqual(30, vel.z);
|
||||
try std.testing.expectEqual(1, @TypeOf(vel).dims.get(.L));
|
||||
try std.testing.expectEqual(-1, @TypeOf(vel).dims.get(.T));
|
||||
|
||||
// Vector multiplied by scalar Quantity (Position = Velocity * Time)
|
||||
const new_pos = vel.mulByScalar(time);
|
||||
try std.testing.expectEqual(100, new_pos.x);
|
||||
try std.testing.expectEqual(200, new_pos.y);
|
||||
try std.testing.expectEqual(300, new_pos.z);
|
||||
try std.testing.expectEqual(1, @TypeOf(new_pos).dims.get(.L));
|
||||
try std.testing.expectEqual(0, @TypeOf(new_pos).dims.get(.T));
|
||||
}
|
||||
|
||||
test "Vec3 Element-wise Math and Scaling" {
|
||||
const Meter = Quantity(i32, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
const Vec3M = Meter.Vec3;
|
||||
|
||||
const v1 = Vec3M{ .x = 10, .y = 20, .z = 30 };
|
||||
const v2 = Vec3M{ .x = 2, .y = 5, .z = 10 };
|
||||
|
||||
// Element-wise division
|
||||
const div = v1.divBy(v2);
|
||||
try std.testing.expectEqual(5, div.x);
|
||||
try std.testing.expectEqual(4, div.y);
|
||||
try std.testing.expectEqual(3, div.z);
|
||||
try std.testing.expectEqual(0, @TypeOf(div).dims.get(.L)); // M / M = Dimensionless
|
||||
|
||||
// Scale by primitive
|
||||
const scaled = v1.scale(2);
|
||||
try std.testing.expectEqual(20, scaled.x);
|
||||
try std.testing.expectEqual(40, scaled.y);
|
||||
try std.testing.expectEqual(60, scaled.z);
|
||||
}
|
||||
|
||||
test "Vec3 Conversions" {
|
||||
const KiloMeter = Quantity(i32, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .k }));
|
||||
const Meter = Quantity(i32, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
|
||||
const v_km = KiloMeter.Vec3{ .x = 1, .y = 2, .z = 3 };
|
||||
const v_m = v_km.to(Meter);
|
||||
|
||||
try std.testing.expectEqual(1000, v_m.x);
|
||||
try std.testing.expectEqual(2000, v_m.y);
|
||||
try std.testing.expectEqual(3000, v_m.z);
|
||||
|
||||
// Type checking the result
|
||||
try std.testing.expectEqual(1, @TypeOf(v_m).dims.get(.L));
|
||||
try std.testing.expectEqual(UnitScale.none, @TypeOf(v_m).scales.get(.L));
|
||||
}
|
||||
|
||||
test "Vec3 Length" {
|
||||
const MeterInt = Quantity(i32, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
const MeterFloat = Quantity(f32, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
|
||||
// Integer length (using your custom isqrt)
|
||||
// 3-4-5 triangle on XY plane
|
||||
const v_int = MeterInt.Vec3{ .x = 3, .y = 4, .z = 0 };
|
||||
try std.testing.expectEqual(25, v_int.lengthSqr());
|
||||
try std.testing.expectEqual(5, v_int.length());
|
||||
|
||||
// Float length
|
||||
const v_float = MeterFloat.Vec3{ .x = 3.0, .y = 4.0, .z = 0.0 };
|
||||
try std.testing.expectApproxEqAbs(@as(f32, 25.0), v_float.lengthSqr(), 1e-4);
|
||||
try std.testing.expectApproxEqAbs(@as(f32, 5.0), v_float.length(), 1e-4);
|
||||
}
|
||||
|
||||
test "Comprehensive Benchmark: All Ops × All Types" {
|
||||
const Io = std.Io;
|
||||
const ITERS: usize = 100_000;
|
||||
const SAMPLES: usize = 10; // Number of samples for stats
|
||||
|
||||
var gsink: f64 = 0;
|
||||
const io = std.testing.io;
|
||||
|
||||
// Standard Zig 0.16 timestamp retrieval
|
||||
const getTime = struct {
|
||||
fn f(i: Io) Io.Timestamp {
|
||||
return Io.Clock.awake.now(i);
|
||||
}
|
||||
}.f;
|
||||
|
||||
const fold = struct {
|
||||
fn f(comptime TT: type, s: *f64, v: TT) void {
|
||||
s.* += if (comptime @typeInfo(TT) == .float)
|
||||
@as(f64, @floatCast(v))
|
||||
else
|
||||
@as(f64, @floatFromInt(v));
|
||||
}
|
||||
}.f;
|
||||
|
||||
const getVal = struct {
|
||||
fn f(comptime TT: type, i: usize, comptime mask: u7) TT {
|
||||
const v: u8 = @as(u8, @truncate(i & @as(usize, mask))) + 1;
|
||||
return if (comptime @typeInfo(TT) == .float) @floatFromInt(v) else @intCast(v);
|
||||
}
|
||||
}.f;
|
||||
|
||||
const Stats = struct {
|
||||
median: f64,
|
||||
delta: f64,
|
||||
ops_per_sec: f64,
|
||||
};
|
||||
|
||||
const computeStats = struct {
|
||||
fn f(samples: []f64, iters: usize) Stats {
|
||||
std.mem.sort(f64, samples, {}, std.sort.asc(f64));
|
||||
const mid = samples.len / 2;
|
||||
const median_ns = if (samples.len % 2 == 0) (samples[mid - 1] + samples[mid]) / 2.0 else samples[mid];
|
||||
|
||||
const low = samples[0];
|
||||
const high = samples[samples.len - 1];
|
||||
const delta_ns = (high - low) / 2.0;
|
||||
|
||||
const ns_per_op = median_ns / @as(f64, @floatFromInt(iters));
|
||||
return .{
|
||||
.median = ns_per_op,
|
||||
.delta = (delta_ns / @as(f64, @floatFromInt(iters))),
|
||||
.ops_per_sec = 1_000_000_000.0 / ns_per_op,
|
||||
};
|
||||
}
|
||||
}.f;
|
||||
|
||||
std.debug.print(
|
||||
\\
|
||||
\\ Quantity<T> benchmark — {d} iterations, {d} samples/cell
|
||||
\\
|
||||
\\┌───────────────────┬──────┬─────────────────────┬─────────────────────┐
|
||||
\\│ Operation │ Type │ ns / op (± delta) │ Throughput (ops/s) │
|
||||
\\├───────────────────┼──────┼─────────────────────┼─────────────────────┤
|
||||
\\
|
||||
, .{ ITERS, SAMPLES });
|
||||
|
||||
const Types = .{ i16, i32, i64, i128, f32, f64 };
|
||||
const TNames = .{ "i16", "i32", "i64", "i128", "f32", "f64" };
|
||||
const Ops = .{ "add", "sub", "mulBy", "divBy", "scale", "to" };
|
||||
|
||||
var results_matrix: [Ops.len][Types.len]f64 = undefined;
|
||||
|
||||
comptime var tidx: usize = 0;
|
||||
inline for (Types, TNames) |T, tname| {
|
||||
const M = Quantity(T, Dimensions.init(.{ .L = 1 }), Scales.init(.{}));
|
||||
const KM = Quantity(T, Dimensions.init(.{ .L = 1 }), Scales.init(.{ .L = .k }));
|
||||
const S = Quantity(T, Dimensions.init(.{ .T = 1 }), Scales.init(.{}));
|
||||
|
||||
inline for (Ops, 0..) |op_name, oidx| {
|
||||
var samples: [SAMPLES]f64 = undefined;
|
||||
|
||||
for (0..SAMPLES) |s_idx| {
|
||||
var sink: T = 0;
|
||||
const t_start = getTime(io);
|
||||
|
||||
for (0..ITERS) |i| {
|
||||
const r = if (comptime std.mem.eql(u8, op_name, "add"))
|
||||
(M{ .value = getVal(T, i, 63) }).add(M{ .value = getVal(T, i +% 7, 63) })
|
||||
else if (comptime std.mem.eql(u8, op_name, "sub"))
|
||||
(M{ .value = getVal(T, i +% 10, 63) }).sub(M{ .value = getVal(T, i, 63) })
|
||||
else if (comptime std.mem.eql(u8, op_name, "mulBy"))
|
||||
(M{ .value = getVal(T, i, 63) }).mulBy(M{ .value = getVal(T, i +% 1, 63) })
|
||||
else if (comptime std.mem.eql(u8, op_name, "divBy"))
|
||||
(M{ .value = getVal(T, i +% 10, 63) }).divBy(S{ .value = getVal(T, i, 63) })
|
||||
else if (comptime std.mem.eql(u8, op_name, "scale"))
|
||||
(M{ .value = getVal(T, i, 63) }).scale(getVal(T, i +% 2, 63))
|
||||
else
|
||||
(KM{ .value = getVal(T, i, 15) }).to(M);
|
||||
|
||||
if (comptime @typeInfo(T) == .float) sink += r.value else sink ^= r.value;
|
||||
}
|
||||
|
||||
const t_end = getTime(io);
|
||||
samples[s_idx] = @as(f64, @floatFromInt(t_start.durationTo(t_end).toNanoseconds()));
|
||||
fold(T, &gsink, sink);
|
||||
}
|
||||
|
||||
const stats = computeStats(&samples, ITERS);
|
||||
results_matrix[oidx][tidx] = stats.median;
|
||||
|
||||
std.debug.print("│ {s:<17} │ {s:<4} │ {d:>8.2} ns ±{d:<6.2} │ {d:>19.0} │\n", .{ op_name, tname, stats.median, stats.delta, stats.ops_per_sec });
|
||||
}
|
||||
|
||||
if (comptime tidx < Types.len - 1) {
|
||||
std.debug.print("├───────────────────┼──────┼─────────────────────┼─────────────────────┤\n", .{});
|
||||
}
|
||||
tidx += 1;
|
||||
}
|
||||
|
||||
// Median Summary Table
|
||||
std.debug.print("└───────────────────┴──────┴─────────────────────┴─────────────────────┘\n\n", .{});
|
||||
std.debug.print("Median Summary (ns/op):\n", .{});
|
||||
std.debug.print("Operation │ i16 │ i32 │ i64 │ i128 │ f32 │ f64 \n", .{});
|
||||
std.debug.print("───────────────┼───────┼───────┼───────┼───────┼───────┼───────\n", .{});
|
||||
|
||||
inline for (Ops, 0..) |op_name, oidx| {
|
||||
std.debug.print("{s:<14} │", .{op_name});
|
||||
var i: usize = 0;
|
||||
while (i < Types.len) : (i += 1) {
|
||||
std.debug.print("{d:>6.1} │", .{results_matrix[oidx][i]});
|
||||
}
|
||||
std.debug.print("\n", .{});
|
||||
}
|
||||
|
||||
std.debug.print("\nAnti-optimisation sink: {d:.4}\n", .{gsink});
|
||||
try std.testing.expect(gsink != 0);
|
||||
}
|
||||
Reference in New Issue
Block a user