from pyglet.gl import *


class Triangle:
    def __init__(self):
        self.triangle=[-0.5,-0.5, 0.0, 1.0, 0.0, 0.0,
                        0.5,-0.5, 0.0, 0.0, 1.0, 0.0,
                        0.0, 0.5, 0.0, 0.0, 0.0, 1.0]
        self.vertex_shader_source="""
        #version 330
        in layout(location=0) vec3 position;
        in layout(location=1) vec3 color;

        out vec3 newColor;
        void main()
        {
            gl_Position=vec4(position,1.0f)
            newColor=color;
        }
        """

        self.fragement_shader_source="""
        #version 330
        in vec3 newColor;
        out vec4 outColor;
        void main()
        {
        outColor=vec4(newColor,1.0f)
        }
        """

        shader=OpenGL.GL.shaders.compileProgram(OpenGL.GL.shaders.compileShader(self.vertex_shader_source,GL_VERTEX_SHADER),
                                                OpenGL.GL.shaders.compileShader(self.fragement_shader_source,GL_FRAGMENT_SHADER))

        glUseProgram(shader)
        vbo=GLuint(0)
        glGenBuffers(1,vbo)
        glBindBuffer(GL_ARRAY_BUFFER,vbo)
        glBufferData(GL_ARRAY_BUFFER,72,(GLfloat*len(self.triangles)(*self.triangles),GL_STATIC_DRAW))
        #positions
        glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,24,ctypes.c_void_p(0))
        glEnableVertexAttribArray(0)

        glVertexAttribPointer(1,3,GL_FLOAT,GL_FALSE,24,ctypes.c_void_p(12))
        glEnableVertexAttribArray(0)