added models waving cubes example

Author: Tim Fong 2

examples/models/models_waving_cubes.py

@@ -0,0 +1,79 @@
+from pyray import *
+import pyray
+import math
+
+# Program main entry point
+# Initialization
+screenWidth = 800
+screenHeight = 450
+
+init_window(screenWidth, screenHeight, "raylib [models] example - waving cubes")
+
+# Initialize the camera
+camera = Camera3D()
+camera.position = Vector3(30.0, 20.0, 30.0)  # Camera position
+camera.target = Vector3(0.0, 0.0, 0.0)       # Camera looking at point
+camera.up = Vector3(0.0, 1.0, 0.0)           # Camera up vector (rotation towards target)
+camera.fovy = 70.0                           # Camera field-of-view Y
+camera.projection = pyray.CAMERA_PERSPECTIVE      # Camera projection type
+
+# Specify the amount of blocks in each direction
+numBlocks = 15
+
+set_target_fps(60)
+
+# Main game loop
+while not window_should_close():  # Detect window close button or ESC key
+    # Update
+    time = get_time()
+
+    # Calculate time scale for cube position and size
+    scale = (2.0 + math.sin(time)) * 0.7
+
+    # Move camera around the scene
+    cameraTime = time * 0.3
+    camera.position.x = math.cos(cameraTime) * 40.0
+    camera.position.z = math.sin(cameraTime) * 40.0
+
+    # Draw
+    begin_drawing()
+
+    clear_background(RAYWHITE)
+
+    begin_mode_3d(camera)
+
+    draw_grid(10, 5.0)
+
+    for x in range(numBlocks):
+        for y in range(numBlocks):
+            for z in range(numBlocks):
+                # Scale of the blocks depends on x/y/z positions
+                blockScale = (x + y + z) / 30.0
+
+                # Scatter makes the waving effect by adding blockScale over time
+                scatter = math.sin(blockScale * 20.0 + time * 4.0)
+
+                # Calculate the cube position
+                cubePos = Vector3(
+                    (x - numBlocks / 2) * (scale * 3.0) + scatter,
+                    (y - numBlocks / 2) * (scale * 2.0) + scatter,
+                    (z - numBlocks / 2) * (scale * 3.0) + scatter,
+                )
+
+                # Pick a color with a hue depending on cube position for the rainbow color effect
+                cubeColor = color_from_hsv(((x + y + z) * 18) % 360, 0.75, 0.9)
+
+                # Calculate cube size
+                cubeSize = (2.4 - scale) * blockScale
+
+                # And finally, draw the cube!
+                draw_cube(cubePos, cubeSize, cubeSize, cubeSize, cubeColor)
+
+    end_mode_3d()
+
+    draw_fps(10, 10)
+
+    end_drawing()
+
+# De-Initialization
+close_window()  # Close window and OpenGL context