def __init__(self,vs: str,fs: str,MaxText=8):
self.MaxQuadCount = 2000
self.MaxVertexCount = self.MaxQuadCount * 4
self.MaxIndexCount = self.MaxQuadCount * 6
self.MaxTextures = MaxText
self.QuadVA = 0
self.QuadVB = 0
self.QuadIB = 0
self.WhiteTexture = 0 #The first texture unit is reserv for a 1x1 white texture
self.IndexCount = 0
self.QuadBuffer = [Vertex()]
self.QuadBufferPtr = 0
self.TextureSlots = [0] * self.MaxTextures
self.TextureSlotIndex = 1
self.TexCoords = [vec2(0,0), vec2(1,0), vec2(1,1), vec2(0,1)]
self.shader = Shader(vs,fs)
print("Texture Units: " + str(self.MaxTextures))
self.QuadVA = glGenVertexArrays(1)
glBindVertexArray(self.QuadVA)
self.QuadVB = glGenBuffers(1)
glBindBuffer(GL_ARRAY_BUFFER, self.QuadVB)
glBufferData(GL_ARRAY_BUFFER, self.MaxVertexCount * 10 * sizeOfFloat, None, GL_DYNAMIC_DRAW)
#Layout Position
glEnableVertexAttribArray(0)
glVertexAttribPointer(0,3,GL_FLOAT, GL_FALSE, 10*sizeOfFloat,ctypes.c_void_p(0)) #The last parm is the offset, can't find a offset function
#Layout Color
glEnableVertexAttribArray(1)
glVertexAttribPointer(1,4,GL_FLOAT, GL_FALSE, 10*sizeOfFloat,ctypes.c_void_p(12))
#Layout TexCoords
glEnableVertexAttribArray(2)
glVertexAttribPointer(2,2,GL_FLOAT, GL_FALSE, 10*sizeOfFloat,ctypes.c_void_p(28))
#Layout TexIndex
glEnableVertexAttribArray(3)
glVertexAttribPointer(3,1,GL_FLOAT, GL_FALSE, 10*sizeOfFloat,ctypes.c_void_p(36))
self.shader.Bind()
loc = self.shader.GetUniformLocation("u_Textures")
samplers = []
for i in range(0,self.MaxTextures,1):
samplers.append(i)
glUniform1iv(loc, self.MaxTextures ,numpy.array(samplers,dtype=numpy.int32))
indices = [0] * self.MaxIndexCount
offset = 0
for i in range(0,self.MaxIndexCount,6):
indices[i + 0] = 0 + offset
indices[i + 1] = 1 + offset
indices[i + 2] = 2 + offset
indices[i + 3] = 2 + offset
indices[i + 4] = 3 + offset
indices[i + 5] = 0 + offset
offset += 4
self.QuadIB = glGenBuffers(1)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,self.QuadIB)
glBufferData(GL_ELEMENT_ARRAY_BUFFER,size=None,data=numpy.array(indices,dtype=numpy.uint32),usage=GL_STATIC_DRAW)
self.WhiteTexture = glGenTextures(1)
glBindTexture(GL_TEXTURE_2D, self.WhiteTexture)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE)
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE)
white_color = [[255,255,255,255]]
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 1, 1, 0, GL_RGBA, GL_UNSIGNED_BYTE, white_color)
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA)
self.TextureSlots[0] = self.WhiteTexture
for i in range(1,self.MaxTextures,1):
self.TextureSlots[i] = 0
