Added waving cubes example

examples/models/models_waving_cubes.c

@@ -0,0 +1,105 @@
+/*******************************************************************************************
+*
+*   raylib [models] example - Waving cubes
+*
+*   This example has been created using raylib 2.5 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2019 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#include <math.h>
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    InitWindow(screenWidth, screenHeight, "raylib [models] example - waving cubes");
+
+    // Initialize the camera
+    Camera3D camera;
+    camera.position = (Vector3){ 30.0f, 20.0f, 30.0f };
+    camera.target = (Vector3){ 0.0f, 0.0f, 0.0f };
+    camera.up = (Vector3){ 0.0f, 1.0f, 0.0f };
+    camera.fovy = 70.0f;
+    camera.type = CAMERA_PERSPECTIVE;
+
+    // Specify the amount of blocks in each direction
+    const int numBlocks = 15;
+
+    SetTargetFPS(60);
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        double time = GetTime();
+
+        // Calculate time scale for cube position and size
+        float scale = (2.0f + (float)sin(time)) * 0.7f;
+
+        // Move camera around the scene
+        double cameraTime = time * 0.3;
+        camera.position.x = (float)cos(cameraTime) * 40.0f;
+        camera.position.z = (float)sin(cameraTime) * 40.0f;
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+            ClearBackground(RAYWHITE);
+
+            BeginMode3D(camera);
+
+                DrawGrid(10, 5.0f);
+
+                for (int x = 0; x < numBlocks; x++) {
+                    for (int y = 0; y < numBlocks; y++) {
+                        for (int z = 0; z < numBlocks; z++) {
+                            // Scale of the blocks depends on x/y/z positions
+                            float blockScale = (x + y + z) / 30.0f;
+
+                            // Scatter makes the waving effect by adding blockScale over time
+                            float scatter = sinf(blockScale * 20.0f + (float)(time * 4.0f));
+
+                            // Calculate the cube position
+                            Vector3 cubePos = {
+                                (float)(x - numBlocks / 2) * (scale * 3.0f) + scatter,
+                                (float)(y - numBlocks / 2) * (scale * 2.0f) + scatter,
+                                (float)(z - numBlocks / 2) * (scale * 3.0f) + scatter
+                            };
+
+                            // Pick a color with a hue depending on cube position for the rainbow color effect
+                            Color cubeColor = ColorFromHSV((Vector3){ (float)(((x + y + z) * 18) % 360), 0.75f, 0.9f });
+
+                            // Calculate cube size
+                            float cubeSize = (2.4f - scale) * blockScale;
+
+                            // And finally, draw the cube!
+                            DrawCube(cubePos, cubeSize, cubeSize, cubeSize, cubeColor);
+                        }
+                    }
+                }
+
+            DrawFPS(10, 10);
+
+            EndMode3D();
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}