Engine Code

engine/window.py

@@ -0,0 +1,119 @@
+import glfw
+from OpenGL.GL import *
+
+
+class Window:
+    def __init__(self, width, height, title):
+        if not glfw.init():
+            raise Exception("Failed to initialize GLFW")
+
+        glfw.window_hint(glfw.CONTEXT_VERSION_MAJOR, 3)
+        glfw.window_hint(glfw.CONTEXT_VERSION_MINOR, 3)
+        glfw.window_hint(glfw.OPENGL_PROFILE, glfw.OPENGL_CORE_PROFILE)
+        self.window = glfw.create_window(width, height, title, None, None)
+        if not self.window:
+            glfw.terminate()
+            raise Exception("Failed to create GLFW window")
+        glfw.make_context_current(self.window)
+        glfw.set_framebuffer_size_callback(self.window, self._framebuffer_size_callback)
+        glEnable(GL_DEPTH_TEST)
+
+        glEnable(GL_CULL_FACE)
+        glCullFace(GL_BACK)
+
+        self.width = width
+        self.height = height
+
+        self.last_x = width / 2
+        self.last_y = height / 2
+        self.first_mouse = True
+        self.keys = {}
+
+        self.x_offset = 0
+        self.y_offset = 0
+
+        glfw.set_cursor_pos_callback(self.window, self._mouse_callback)
+        glfw.set_key_callback(self.window, self._key_callback)
+        glfw.set_scroll_callback(self.window, self._scroll_callback)
+
+        self.mouse_buttons = {}
+        glfw.set_mouse_button_callback(self.window, self._mouse_button_callback)
+
+        self.scroll_offset = 0
+
+    def _framebuffer_size_callback(self, window, width, height):
+        glViewport(0, 0, width, height)
+        self.width = width
+        self.height = height
+
+    def _mouse_callback(self, window, xpos, ypos):
+        if self.first_mouse:
+            self.last_x = xpos
+            self.last_y = ypos
+            self.first_mouse = False
+
+        self.x_offset = xpos - self.last_x
+        self.y_offset = self.last_y - ypos
+
+        self.last_x = xpos
+        self.last_y = ypos
+
+    def _key_callback(self, window, key, scancode, action, mods):
+        if action == glfw.PRESS:
+            self.keys[key] = True
+        elif action == glfw.RELEASE:
+            self.keys[key] = False
+
+    def _mouse_button_callback(self, window, button, action, mods):
+        if action == glfw.PRESS:
+            self.mouse_buttons[button] = True
+        elif action == glfw.RELEASE:
+            self.mouse_buttons[button] = False
+
+    def _scroll_callback(self, window, xoffset, yoffset):
+        self.scroll_offset = yoffset
+
+    def is_key_pressed(self, key):
+        return key in self.keys and self.keys[key]
+
+    def is_mouse_button_pressed(self, button):
+        return button in self.mouse_buttons and self.mouse_buttons[button]
+
+    def get_mouse_position(self):
+        return glfw.get_cursor_pos(self.window)
+
+    def get_mouse_offset(self):
+        offset = (self.x_offset, self.y_offset)
+        self.x_offset = 0
+        self.y_offset = 0
+        return offset
+
+    def get_scroll_offset(self):
+        offset = self.scroll_offset
+        self.scroll_offset = 0
+        return offset
+
+    def poll_events(self):
+        glfw.poll_events()
+
+    def should_close(self):
+        return glfw.window_should_close(self.window)
+
+    def set_should_close(self, value):
+        glfw.set_window_should_close(self.window, value)
+
+    def clear(self, r, g, b, a):
+        glClearColor(r, g, b, a)
+        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
+
+    def swap_buffers(self):
+        glfw.swap_buffers(self.window)
+
+    def terminate(self):
+        glfw.terminate()
+
+    def get_aspect_ratio(self):
+        return self.width / self.height
+
+    def set_cursor_mode(self, mode):
+        glfw.set_input_mode(self.window, glfw.CURSOR, mode)