from Context import Context from Buffer import Buffer from Shader import Shader from Program import Program from Texture import Texture from Mat4 import Mat4 import OpenGL.GL as gl import ctypes c = Context() b = Buffer(gl.GL_ARRAY_BUFFER, gl.GL_STATIC_DRAW, ctypes.c_int) b.sync() b.push(1) b.push(2) b.push(3) b.push(4) b.push(5) b[12] = 3 assert(b[0]==1) assert(b[1]==2) assert(b[2]==3) assert(b[3]==4) assert(b[4]==5) assert(b[5]==0) assert(b[13]==None) b.sync()
class Renderer(object):
def __init__(self):
self.program = Program('Shader/Quad.prog')
# Prepare quad geometry
self.vbuffer = Buffer(gl.GL_ARRAY_BUFFER, gl.GL_STATIC_DRAW, Vertex)
self.vbuffer.push(Vertex(-.5, -.5, 0, 0, 1))
self.vbuffer.push(Vertex(-.5, .5, 0, 0, 0))
self.vbuffer.push(Vertex( .5, -.5, 0, 1, 1))
self.vbuffer.push(Vertex( .5, .5, 0, 1, 0))
# Set up vertex array object for mapping structs => shader inputs
vao = (ctypes.c_int * 1)()
gl.glGenVertexArrays(1, vao)
self.vao = vao[0]
stride = ctypes.sizeof(Vertex)
gl.glBindVertexArray(self.vao)
gl.glBindBuffer(gl.GL_ARRAY_BUFFER, self.vbuffer.id)
gl.glEnableVertexAttribArray(Attr.POSITION)
offset = ctypes.c_void_p(0)
gl.glVertexAttribPointer(Attr.POSITION, 3, gl.GL_FLOAT, gl.GL_FALSE, stride, offset)
gl.glEnableVertexAttribArray(Attr.TEXCOORD)
offset = ctypes.c_void_p(12)
gl.glVertexAttribPointer(Attr.TEXCOORD, 2, gl.GL_FLOAT, gl.GL_FALSE, stride, offset)
gl.glBindVertexArray(0)
def render(self, g):
# Render all objects attached to the graphics context.
for quad in g.quad:
self.quad(g, quad)
for text in g.text:
self.text(g, text)
def quad(self, g, quad):
# Enable alpha blending/transparency
self.vbuffer.sync()
gl.glUseProgram(self.program.id)
gl.glEnable(gl.GL_BLEND)
gl.glEnable(gl.GL_DEPTH_TEST)
gl.glBlendFunc(gl.GL_SRC_ALPHA, gl.GL_ONE_MINUS_SRC_ALPHA)
# Bind texture
gl.glUniform1i(self.program.tex, 0)
gl.glBindTexture(gl.GL_TEXTURE_2D, quad.texture.id)
# Set up geometry transforms
worldMatrix = Matrix.scale(quad.width, quad.height, 1)
worldMatrix = Matrix.translate(quad.x, quad.y, 0) * worldMatrix
worldViewProjectionMatrix = g.viewProjectionMatrix * worldMatrix
#worldViewProjectionMatrix = g.viewProjectionMatrix
gl.glUniformMatrix4fv(self.program.worldViewProjectionMatrix, 1, 0,
worldViewProjectionMatrix.data)
# Draw geometry
gl.glBindVertexArray(self.vao)
gl.glDrawArrays(gl.GL_TRIANGLE_STRIP, 0, 4)
gl.glBindVertexArray(0)
def text(self, g, text):
pass
