Merge pull request #79 from romariops/Examples/core_2d_camera_mouse_zoom

examples/core/core_2d_camera_mouse_zoom.py

@@ -0,0 +1,67 @@
+"""
+raylib [core] example - 2d camera mouse zoom
+"""
+
+import pyray
+
+SCREEN_WIDTH = 800
+SCREEN_HEIGHT = 450
+
+pyray.init_window(SCREEN_WIDTH, SCREEN_HEIGHT, "raylib [core] example - 2d camera mouse zoom")
+
+pyray.set_target_fps(60)
+
+camera = pyray.Camera2D()
+
+camera = pyray.Camera2D()
+camera.zoom = 1.0
+
+pyray.set_target_fps(60); 
+
+# main game loop
+while not pyray.window_should_close():   
+    # update
+    if pyray.is_mouse_button_down(pyray.MOUSE_BUTTON_RIGHT):
+        delta = pyray.get_mouse_delta()
+        delta = pyray.vector2_scale(delta, -1.0 / camera.zoom)
+        camera.target = pyray.vector2_add(camera.target, delta)
+
+    # zoom based on mouse wheel
+    wheel = pyray.get_mouse_wheel_move()
+    if wheel != 0:
+
+        mouseWorldPos = pyray.get_screen_to_world_2d(pyray.get_mouse_position(), camera)
+        
+        camera.offset = pyray.get_mouse_position()
+
+        camera.target = mouseWorldPos
+
+        ZOOM_INCREMENT = 0.125
+
+        camera.zoom += (wheel*ZOOM_INCREMENT)
+        if (camera.zoom < ZOOM_INCREMENT): camera.zoom = ZOOM_INCREMENT
+
+
+    # draw
+    pyray.begin_drawing()
+    pyray.clear_background(pyray.BLACK)
+
+    pyray.begin_mode_2d(camera)
+
+    pyray.rl_push_matrix()
+    pyray.rl_translatef(0, 25*50, 0)
+    pyray.rl_rotatef(90, 1, 0, 0)
+    pyray.draw_grid(100, 50)
+    pyray.rl_pop_matrix()
+
+    pyray.draw_circle(100, 100, 50, pyray.YELLOW)
+            
+    pyray.end_mode_2d()
+
+    pyray.draw_text("Mouse right button drag to move, mouse wheel to zoom", 10, 10, 20, pyray.WHITE);
+    
+    pyray.end_drawing()
+
+# de-Initialization
+pyray.close_window()   
+