| import sys,os,math |
| import pygame as pg |
| from OpenGL import GL |
|
|
| sys.path.append("..") |
| sys.path.append("data") |
| import myframework |
| from vertices_perspective import VERTICES |
|
|
| class Shader(myframework.BaseShader): |
| def __init__(self,vertices,vert_file,frag_file): |
| myframework.BaseShader.__init__(self,vertices,vert_file,frag_file) |
| GL.glEnable(GL.GL_CULL_FACE) |
| GL.glCullFace(GL.GL_BACK) |
| GL.glFrontFace(GL.GL_CW) |
|
|
| def setup_uniforms(self): |
| self.offset_location = GL.glGetUniformLocation(self.shader,"offset") |
| self.perspective_matrix_unif = GL.glGetUniformLocation(self.shader,"perspectiveMatrix") |
| self.frustum_scale = 1.0 |
| self.z_near,self.z_far = 0.5,3.0 |
| self.create_matrix() |
|
|
| GL.glUseProgram(self.shader) |
| GL.glUniformMatrix4fv(self.perspective_matrix_unif,1,GL.GL_FALSE,self.the_matrix) |
| GL.glUseProgram(0) |
|
|
| def create_matrix(self): |
| self.the_matrix = [0.0 for i in range(16)] |
| self.the_matrix[0] = self.frustum_scale |
| self.the_matrix[5] = self.frustum_scale |
| self.the_matrix[10] = (self.z_far+self.z_near)/(self.z_near-self.z_far) |
| self.the_matrix[14] = (2*self.z_far*self.z_near)/(self.z_near-self.z_far) |
| self.the_matrix[11] = -1.0 |
|
|
| def display(self): |
| GL.glClearColor(0,0,0,0) |
| GL.glClear(GL.GL_COLOR_BUFFER_BIT) |
|
|
| GL.glUseProgram(self.shader) |
| GL.glUniform2f(self.offset_location,0.5,0.5) |
| color_data = GL.GLvoidp((len(self.vertices)*self.size_float)/2) |
|
|
| GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.vbo) |
| GL.glEnableVertexAttribArray(0) |
| GL.glEnableVertexAttribArray(1) |
| GL.glVertexAttribPointer(0,self.vert_comp,GL.GL_FLOAT,GL.GL_FALSE,0,None) |
| GL.glVertexAttribPointer(1,self.vert_comp,GL.GL_FLOAT,GL.GL_FALSE,0,color_data) |
|
|
| GL.glDrawArrays(GL.GL_TRIANGLES,0,36) |
|
|
| GL.glDisableVertexAttribArray(0) |
| GL.glDisableVertexAttribArray(1) |
| GL.glUseProgram(0) |
|
|
| def main(): |
| pg.init() |
| os.environ['SDL_VIDEO_CENTERED'] = '1' |
| SCREEN = pg.display.set_mode((500,500),pg.HWSURFACE|pg.OPENGL|pg.DOUBLEBUF|pg.RESIZABLE) |
| MyClock = pg.time.Clock() |
| MyGL = Shader(VERTICES[:],os.path.join("data","MatrixPerspective.vert"),os.path.join("data","StandardColors.frag")) |
| done = False |
| while not done: |
| for event in pg.event.get(): |
| if event.type==pg.QUIT or (event.type==pg.KEYDOWN and event.key==pg.K_ESCAPE): |
| done = True |
| elif event.type == pg.KEYDOWN: |
| pass |
| elif event.type == pg.VIDEORESIZE: |
| MyGL.reshape(*event.size) |
| MyGL.display() |
| pg.display.flip() |
| MyClock.tick(60) |
|
|
| if __name__ == '__main__': |
| main() |
| pg.quit() |
| sys.exit() |
|
|
