adding example with translation, rotation and scale for 2D Rectangle. #5209

examples/Makefile

@@ -563,7 +563,8 @@ SHAPES = \
     shapes/shapes_rounded_rectangle_drawing \
     shapes/shapes_splines_drawing \
     shapes/shapes_top_down_lights \
-    shapes/shapes_vector_angle
+    shapes/shapes_vector_angle \
+    shapes/shapes_translation_rotation_scale
 
 TEXTURES = \
     textures/textures_background_scrolling \

examples/Makefile.Web

@@ -563,7 +563,8 @@ SHAPES = \
     shapes/shapes_rounded_rectangle_drawing \
     shapes/shapes_splines_drawing \
     shapes/shapes_top_down_lights \
-    shapes/shapes_vector_angle
+    shapes/shapes_vector_angle \
+    shapes/shapes_translation_rotation_scale
 
 TEXTURES = \
     textures/textures_background_scrolling \

examples/shapes/shapes_translation_rotation_scale.c

@@ -0,0 +1,96 @@
+/*******************************************************************************************
+*
+*   raylib [shape] example - Translation, rotation and scaling
+*
+*   Example complexity rating: [★☆☆☆] 1/4
+*
+*   Example originally created with raylib 5.5, last time updated with raylib 5.6
+*
+*   Example contributed by zerasul (@zerasul) and reviewed by Ramon Santamaria (@raysan5)
+*
+*   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 zerasul (@zerasul) - All rights reserved.
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib shape example - Translation, rotation and scaling");
+
+    // Rectangle variables
+    int rectWidth = 100;
+    int rectHeight = 100;
+    Rectangle rec = { 300,400, rectWidth, rectHeight };
+    Vector2 origin = { rectWidth/2.0f, rectHeight/2.0f };
+    //rotation angle and scale factors
+    float rotation = 0.0f;
+    float scale = 1.0f;
+
+
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+       //----------------------------------------------------------------------------------
+
+       //if an arrow key is pressed, move the rectangle in the corresponding direction
+       if(IsKeyDown(KEY_RIGHT)) rec.x += 2.0f;
+       if(IsKeyDown(KEY_LEFT)) rec.x -= 2.0f;
+       if(IsKeyDown(KEY_UP)) rec.y -= 2.0f;
+       if(IsKeyDown(KEY_DOWN)) rec.y += 2.0f;
+
+       //if R or T keys are pressed, rotate the rectangle
+       if(IsKeyDown(KEY_R)) rotation += 2.0f;
+       if(IsKeyDown(KEY_T)) rotation -= 2.0f;
+
+       //if + or - keys are pressed, scale the rectangle
+       if(IsKeyDown(KEY_KP_ADD)) scale += 0.02f;
+       if(IsKeyDown(KEY_KP_SUBTRACT)) scale -= 0.02f;
+
+       //scale limits
+       if(scale < 0.1f) scale = 0.1f;
+       if(scale > 3.0f) scale = 3.0f;
+
+       //recalcuate rectangle size and origin based on scale
+       rec.width = rectWidth * scale;
+       rec.height = rectHeight * scale;
+       origin = (Vector2){ rec.width/2.0f, rec.height/2.0f };
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+            DrawText("Translation, Rotation and Scale Example", 10, 10, 30, LIGHTGRAY);
+            DrawText("Use arrow keys to move rectangle", 10, 50, 20, DARKGRAY);
+            DrawText("Use R and T keys to rotate rectangle", 10, 80, 20, DARKGRAY);
+            DrawText("Use + and - keys to scale rectangle", 10, 110, 20, DARKGRAY);
+
+            DrawRectanglePro(rec, origin, rotation, RED); // Rotation around rectangle center
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+
+    // De-Initialization
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}