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| # Copyright (c) Meta Platforms, Inc. and affiliates. | |
| # This source code is licensed under the MIT license found in the | |
| # LICENSE file in the root directory of this source tree. | |
| import numpy as np | |
| import OpenGL.GL as GL | |
| from animated_drawings.model.transform import Transform | |
| import ctypes | |
| class Rectangle(Transform): | |
| def __init__(self, color: str = 'white') -> None: | |
| super().__init__() | |
| if color == 'white': | |
| c = np.array([1.0, 1.0, 1.0], np.float32) | |
| elif color == 'black': | |
| c = np.array([0.3, 0.3, 0.3], np.float32) | |
| elif color == 'blue': | |
| c = np.array([0.00, 0.0, 1.0], np.float32) | |
| else: | |
| assert len(color) == 3 | |
| c = np.array([*color], np.float32) | |
| self.points = np.array([ | |
| [0.5, 0.0, 0.5, *c], # top right | |
| [-0.5, 0.0, -0.5, *c], # bottom left | |
| [-0.5, 0.0, 0.5, *c], # top left | |
| [0.5, 0.0, -0.5, *c], # bottom right | |
| [-0.5, 0.0, -0.5, *c], # bottom left | |
| [0.5, 0.0, 0.5, *c], # top right | |
| ], np.float32) | |
| self.vao = GL.glGenVertexArrays(1) | |
| self.vbo = GL.glGenBuffers(1) | |
| GL.glBindVertexArray(self.vao) | |
| # buffer vertex data | |
| GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.vbo) | |
| GL.glBufferData(GL.GL_ARRAY_BUFFER, self.points, GL.GL_STATIC_DRAW) | |
| # position attributes | |
| GL.glVertexAttribPointer(0, 3, GL.GL_FLOAT, False, 4 * self.points.shape[1], None) | |
| GL.glEnableVertexAttribArray(0) | |
| # color attributes | |
| GL.glVertexAttribPointer(1, 3, GL.GL_FLOAT, False, 4 * self.points.shape[1], ctypes.c_void_p(4 * 3)) | |
| GL.glEnableVertexAttribArray(1) | |
| # texture attributes | |
| GL.glVertexAttribPointer(2, 2, GL.GL_FLOAT, False, 4 * self.points.shape[1], ctypes.c_void_p(4 * 6)) | |
| GL.glEnableVertexAttribArray(2) | |
| GL.glBindBuffer(GL.GL_ARRAY_BUFFER, 0) | |
| GL.glBindVertexArray(0) | |
| def _draw(self, **kwargs) -> None: | |
| GL.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL) | |
| GL.glUseProgram(kwargs['shader_ids']['color_shader']) | |
| model_loc = GL.glGetUniformLocation(kwargs['shader_ids']['color_shader'], "model") | |
| GL.glUniformMatrix4fv(model_loc, 1, GL.GL_FALSE, self._world_transform.T) | |
| GL.glBindVertexArray(self.vao) | |
| GL.glDrawArrays(GL.GL_TRIANGLES, 0, 6) | |