diff --git a/examples/shapes/shapes_kaleidoscope.c b/examples/shapes/shapes_kaleidoscope.c index 07c96344c..7eeadb8aa 100644 --- a/examples/shapes/shapes_kaleidoscope.c +++ b/examples/shapes/shapes_kaleidoscope.c @@ -11,13 +11,26 @@ * Example licensed under an unmodified zlib/libpng license, which is an OSI-certified, * BSD-like license that allows static linking with closed source software * -* Copyright (c) 2025 Hugo ARNAL (@hugoarnal) +* Copyright (c) 2025 Hugo ARNAL (@hugoarnal) and Ramon Santamaria (@raysan5) * ********************************************************************************************/ #include "raylib.h" + #include "raymath.h" +#define MAX_DRAW_LINES 8192 + +// Line data type +typedef struct { + Vector2 start; + Vector2 end; +} Line; + +// Lines array as a global static variable to be stored +// in heap and avoid potential stack overflow (on Web platform) +static Line lines[MAX_DRAW_LINES] = { 0 }; + //------------------------------------------------------------------------------------ // Program main entry point //------------------------------------------------------------------------------------ @@ -30,22 +43,24 @@ int main(void) InitWindow(screenWidth, screenHeight, "raylib [shapes] example - kaleidoscope"); + // Line drawing properties int symmetry = 6; float angle = 360.0f/(float)symmetry; float thickness = 3.0f; + Vector2 mousePos = { 0 }; Vector2 prevMousePos = { 0 }; - - SetTargetFPS(60); - ClearBackground(BLACK); - + Vector2 scaleVector = { 1.0f, -1.0f }; Vector2 offset = { (float)screenWidth/2.0f, (float)screenHeight/2.0f }; + Camera2D camera = { 0 }; camera.target = (Vector2){ 0 }; camera.offset = offset; camera.rotation = 0.0f; camera.zoom = 1.0f; + + int lineCounter = 0; - Vector2 scaleVector = { 1.0f, -1.0f }; + SetTargetFPS(20); //-------------------------------------------------------------------------------------- // Main game loop @@ -53,38 +68,58 @@ int main(void) { // Update //---------------------------------------------------------------------------------- - Vector2 mousePos = GetMousePosition(); + prevMousePos = mousePos; + mousePos = GetMousePosition(); + Vector2 lineStart = Vector2Subtract(mousePos, offset); Vector2 lineEnd = Vector2Subtract(prevMousePos, offset); + + if (IsMouseButtonDown(MOUSE_LEFT_BUTTON)) + { + for (int s = 0; (s < symmetry) && (lineCounter < (MAX_DRAW_LINES - 1)); s++) + { + lineStart = Vector2Rotate(lineStart, angle*DEG2RAD); + lineEnd = Vector2Rotate(lineEnd, angle*DEG2RAD); + + // Store mouse line + lines[lineCounter].start = lineStart; + lines[lineCounter].end = lineEnd; + + // Store reflective line + lines[lineCounter + 1].start = Vector2Multiply(lineStart, scaleVector); + lines[lineCounter + 1].end = Vector2Multiply(lineEnd, scaleVector); + + lineCounter += 2; + } + } //---------------------------------------------------------------------------------- // Draw //---------------------------------------------------------------------------------- BeginDrawing(); + + ClearBackground(RAYWHITE); + BeginMode2D(camera); - if (IsMouseButtonDown(MOUSE_LEFT_BUTTON)) { - for (int i = 0; i < symmetry; i++) { - lineStart = Vector2Rotate(lineStart, angle*DEG2RAD); - lineEnd = Vector2Rotate(lineEnd, angle*DEG2RAD); - - DrawLineEx(lineStart, lineEnd, thickness, WHITE); - - Vector2 reflectLineStart = Vector2Multiply(lineStart, scaleVector); - Vector2 reflectLineEnd = Vector2Multiply(lineEnd, scaleVector); - - DrawLineEx(reflectLineStart, reflectLineEnd, thickness, WHITE); + for (int s = 0; s < symmetry; s++) + { + for (int i = 0; i < lineCounter; i += 2) + { + DrawLineEx(lines[i].start, lines[i].end, thickness, BLACK); + DrawLineEx(lines[i + 1].start, lines[i + 1].end, thickness, BLACK); } } - - prevMousePos = mousePos; EndMode2D(); + + DrawText(TextFormat("LINES: %i/%i", lineCounter, MAX_DRAW_LINES), 10, screenHeight - 30, 20, MAROON); + DrawFPS(10, 10); + EndDrawing(); //---------------------------------------------------------------------------------- } // De-Initialization //-------------------------------------------------------------------------------------- - CloseWindow(); // Close window and OpenGL context //--------------------------------------------------------------------------------------