Add example: shapes_math_angle_rotation (angle rotation lines)

examples/Makefile

@@ -557,6 +557,7 @@ SHAPES = \
     shapes/shapes_lines_bezier \
     shapes/shapes_logo_raylib \
     shapes/shapes_logo_raylib_anim \
+    shapes/shapes_math_angle_rotation \
     shapes/shapes_rectangle_advanced \
     shapes/shapes_rectangle_scaling \
     shapes/shapes_ring_drawing \

examples/Makefile.Web

@@ -557,6 +557,7 @@ SHAPES = \
     shapes/shapes_lines_bezier \
     shapes/shapes_logo_raylib \
     shapes/shapes_logo_raylib_anim \
+    shapes/shapes_math_angle_rotation \
     shapes/shapes_rectangle_advanced \
     shapes/shapes_rectangle_scaling \
     shapes/shapes_ring_drawing \
@@ -862,6 +863,9 @@ shapes/shapes_logo_raylib: shapes/shapes_logo_raylib.c
 shapes/shapes_logo_raylib_anim: shapes/shapes_logo_raylib_anim.c
 	$(CC) -o $@$(EXT) $< $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM)
 
+shapes/shapes_math_angle_rotation: shapes/shapes_math_angle_rotation.c
+	$(CC) -o $@$(EXT) $< $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM)
+
 shapes/shapes_rectangle_advanced: shapes/shapes_rectangle_advanced.c
 	$(CC) -o $@$(EXT) $< $(CFLAGS) $(INCLUDE_PATHS) $(LDFLAGS) $(LDLIBS) -D$(PLATFORM)
 

examples/README.md

@@ -17,7 +17,7 @@ You may find it easier to use than other toolchains, especially when it comes to
 - `zig build [module]` to compile all examples for a module (e.g. `zig build core`)
 - `zig build [example]` to compile _and run_ a particular example (e.g. `zig build core_basic_window`)
 
-## EXAMPLES COLLECTION [TOTAL: 172]
+## EXAMPLES COLLECTION [TOTAL: 173]
 
 ### category: core [40]
 
@@ -66,7 +66,7 @@ Examples using raylib[core](../src/rcore.c) platform functionality like window c
 | [core_undo_redo](core/core_undo_redo.c) | <img src="core/core_undo_redo.png" alt="core_undo_redo" width="80"> | ⭐⭐⭐☆ | 5.5 | 5.6 | [Ramon Santamaria](https://github.com/raysan5) |
 | [core_input_actions](core/core_input_actions.c) | <img src="core/core_input_actions.png" alt="core_input_actions" width="80"> | ⭐⭐☆☆ | 5.5 | 5.6 | [Jett](https://github.com/JettMonstersGoBoom) |
 
-### category: shapes [23]
+### category: shapes [24]
 
 Examples using raylib shapes drawing functionality, provided by raylib [shapes](../src/rshapes.c) module.
 
@@ -95,6 +95,7 @@ Examples using raylib shapes drawing functionality, provided by raylib [shapes](
 | [shapes_double_pendulum](shapes/shapes_double_pendulum.c) | <img src="shapes/shapes_double_pendulum.png" alt="shapes_double_pendulum" width="80"> | ⭐⭐☆☆ | 5.5 | 5.5 | [JoeCheong](https://github.com/Joecheong2006) |
 | [shapes_dashed_line](shapes/shapes_dashed_line.c) | <img src="shapes/shapes_dashed_line.png" alt="shapes_dashed_line" width="80"> | ⭐☆☆☆ | 5.5 | 5.5 | [Luís Almeida](https://github.com/luis605) |
 | [shapes_vector_angle](shapes/shapes_vector_angle.c) | <img src="shapes/shapes_vector_angle.png" alt="shapes_vector_angle" width="80"> | ⭐⭐☆☆ | 1.0 | 5.0 | [Ramon Santamaria](https://github.com/raysan5) |
+| [shapes_math_angle_rotation](shapes/shapes_math_angle_rotation.c) | <img src="shapes/shapes_math_angle_rotation.png" alt="shapes_math_angle_rotation" width="80"> | ⭐☆☆☆ | 5.5 | 5.6 | [Kris](https://github.com/krispy-snacc) |
 
 ### category: textures [26]
 

examples/examples_list.txt

@@ -70,6 +70,7 @@ shapes;shapes_digital_clock;★★★★;5.5;5.6;2025;2025;"Hamza RAHAL";@hmz-rh
 shapes;shapes_double_pendulum;★★☆☆;5.5;5.5;2025;2025;"JoeCheong";@Joecheong2006
 shapes;shapes_dashed_line;★☆☆☆;5.5;5.5;2025;2025;"Luís Almeida";@luis605
 shapes;shapes_vector_angle;★★☆☆;1.0;5.0;2023;2025;"Ramon Santamaria";@raysan5
+shapes;shapes_math_angle_rotation;★☆☆☆;5.5;5.6;0;0;"Kris";@krispy-snacc
 textures;textures_logo_raylib;★☆☆☆;1.0;1.0;2014;2025;"Ramon Santamaria";@raysan5
 textures;textures_srcrec_dstrec;★★★☆;1.3;1.3;2015;2025;"Ramon Santamaria";@raysan5
 textures;textures_image_drawing;★★☆☆;1.4;1.4;2016;2025;"Ramon Santamaria";@raysan5

examples/shaders/shaders_palette_switch.c

@@ -1,6 +1,6 @@
 /*******************************************************************************************
 *
-*   raylib [shaders] example - palette switch
+*   raylib [shaders] example - palette switch
 *
 *   Example complexity rating: [★★★☆] 3/4
 *
@@ -11,7 +11,7 @@
 *         on OpenGL ES 2.0 platforms (Android, Raspberry Pi, HTML5), use #version 100 shaders
 *         raylib comes with shaders ready for both versions, check raylib/shaders install folder
 *
-*   Example originally created with raylib 2.5, last time updated with raylib 3.7
+*   Example originally created with raylib 2.5, last time updated with raylib 3.7
 *
 *   Example contributed by Marco Lizza (@MarcoLizza) and reviewed by Ramon Santamaria (@raysan5)
 *

examples/shapes/shapes_math_angle_rotation.c

@@ -0,0 +1,102 @@
+/*******************************************************************************************
+*
+*   raylib [shapes] example - Math angle rotation lines
+*
+*   Example complexity rating: [★☆☆☆] 1/4
+*
+*   Example originally created with raylib 5.5, last time updated with raylib 5.6
+*
+*   Example contributed by Kris (@krispy-snacc) and reviewed by Ramon Santamaria (@raysan5)
+*
+*   Example licensed under an unmodified zlib/libpng license
+*
+********************************************************************************************/
+
+#include "raylib.h"
+#include "raymath.h" // for DEG2RAD
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 720;
+    const int screenHeight = 400;
+
+    InitWindow(screenWidth, screenHeight, "raylib [shapes] example - angle rotation lines");
+    SetTargetFPS(60);
+
+    Vector2 center = { screenWidth / 2.0f, screenHeight / 2.0f };
+    const float lineLength = 150.0f;
+
+    // Predefined angles for fixed lines
+    int angles[] = { 0, 30, 60, 90 };
+    int numAngles = sizeof(angles)/sizeof(angles[0]);
+
+    float totalAngle = 0.0f; // Animated rotation angle
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        totalAngle += 1.0f; // degrees per frame
+        if (totalAngle >= 360.0f) totalAngle -= 360.0f;
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+            ClearBackground(WHITE);
+
+            DrawText("Fixed angles + rotating line", 10, 10, 20, LIGHTGRAY);
+
+            // Draw fixed-angle lines with colorful gradient
+            for (int i = 0; i < numAngles; i++)
+            {
+                float rad = angles[i] * DEG2RAD;
+                Vector2 end = { center.x + cosf(rad) * lineLength,
+                                center.y + sinf(rad) * lineLength };
+
+                // Gradient color from green → cyan → blue → magenta
+                Color col;
+                switch(i)
+                {
+                    case 0: col = GREEN; break;
+                    case 1: col = ORANGE; break;
+                    case 2: col = BLUE; break;
+                    case 3: col = MAGENTA; break;
+                    default: col = WHITE; break;
+                }
+
+                DrawLineEx(center, end, 5.0f, col);
+
+                // Draw angle label slightly offset along the line
+                Vector2 textPos = { center.x + cosf(rad) * (lineLength + 20),
+                                    center.y + sinf(rad) * (lineLength + 20) };
+                DrawText(TextFormat("%d°", angles[i]), (int)textPos.x, (int)textPos.y, 20, col);
+            }
+
+            // Draw animated rotating line with changing color
+            float animRad = totalAngle * DEG2RAD;
+            Vector2 animEnd = { center.x + cosf(animRad) * lineLength,
+                                center.y + sinf(animRad) * lineLength };
+
+            // Cycle through HSV colors for animated line
+            Color animCol = ColorFromHSV(fmodf(totalAngle, 360.0f), 0.8f, 0.9f);
+            DrawLineEx(center, animEnd, 5.0f, animCol);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}