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tu_04_vbo.py
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tu_04_vbo.py
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# import os,sys
# sys.path.append(os.path.abspath(os.path.dirname(__file__)))
from OpenGL.GL import * # pylint: disable=W0614
import glm
from utils.glutWindow import GlutWindow
from utils.objLoader import objLoader
from utils.shaderLoader import Shader
from utils.textureLoader import textureLoader
class Tu01Win(GlutWindow):
class GLContext(object):
pass
def init_opengl(self):
glClearColor(0.0,0,0.4,0)
glDepthFunc(GL_LESS)
glEnable(GL_DEPTH_TEST)
glEnable(GL_CULL_FACE)
def init_context(self):
self.context = self.GLContext()
self.shader = shader = Shader()
shader.initShaderFromGLSL(["glsl/tu02/vertex.glsl"],["glsl/tu02/fragment.glsl"])
# shader var ids
self.context.MVP_ID = glGetUniformLocation(shader.program,"MVP")
self.context.Texture_ID = glGetUniformLocation(shader.program, "myTextureSampler")
#texture = textureLoader("resources/tu03/uvmap.dds")
#model = objLoader("resources/tu03/cube.obj").to_single_index_style()
texture = textureLoader("resources/tu04/uvmap.DDS")
model = objLoader("resources/tu04/suzanne.obj").to_single_index_style()
self.context.texturebuffer = texture.textureGLID
if(texture.inversedVCoords):
for index in range(0,len(model.texcoords)):
if(index % 2):
model.texcoords[index] = 1.0 - model.texcoords[index]
self.context.vertexbuffer = glGenBuffers(1)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,self.context.vertexbuffer)
glBufferData(GL_ELEMENT_ARRAY_BUFFER,len(model.vertexs)*4,(GLfloat * len(model.vertexs))(*model.vertexs),GL_STATIC_DRAW)
self.context.uvbuffer = glGenBuffers(1)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,self.context.uvbuffer)
glBufferData(GL_ELEMENT_ARRAY_BUFFER,len(model.texcoords)*4,(GLfloat * len(model.texcoords))(*model.texcoords),GL_STATIC_DRAW)
self.context.elementbuffer = glGenBuffers(1)
self.context.elementbufferSize = len(model.indices)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER,self.context.elementbuffer)
glBufferData(GL_ELEMENT_ARRAY_BUFFER,len(model.indices)*2,(GLushort * len(model.indices))(*model.indices),GL_STATIC_DRAW)
def calc_MVP(self,width=1920,height=1080):
self.context.Projection = glm.perspective(glm.radians(45.0),float(width)/float(height),0.1,1000.0)
self.context.View = glm.lookAt(glm.vec3(5,5,5), # Camera is at (4,3,-3), in World Space
glm.vec3(0,0,0), #and looks at the (0.0.0))
glm.vec3(0,1,0) ) #Head is up (set to 0,-1,0 to look upside-down)
self.context.Model= glm.mat4(1.0)
#print self.context.Model
self.context.MVP = self.context.Projection * self.context.View * self.context.Model
def resize(self,Width,Height):
glViewport(0, 0, Width, Height)
self.calc_MVP(Width,Height)
def ogl_draw(self):
# print("draw++")
#print self.context.MVP
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
self.shader.begin()
glUniformMatrix4fv(self.context.MVP_ID,1,GL_FALSE,glm.value_ptr(self.context.MVP))
glActiveTexture(GL_TEXTURE0)
glBindTexture(GL_TEXTURE_2D, self.context.texturebuffer)
glUniform1i(self.context.Texture_ID, 0) #// Set "myTextureSampler" sampler to use Texture Unit 0
glEnableVertexAttribArray(0)
glBindBuffer(GL_ARRAY_BUFFER, self.context.vertexbuffer)
glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,0,None)
glEnableVertexAttribArray(1)
glBindBuffer(GL_ARRAY_BUFFER, self.context.uvbuffer)
glVertexAttribPointer(1,2,GL_FLOAT,GL_FALSE,0,None)
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, self.context.elementbuffer)
glDrawElements(
GL_TRIANGLES, # mode
self.context.elementbufferSize, #// count
GL_UNSIGNED_SHORT, # // type
None #// element array buffer offset
)
glDisableVertexAttribArray(0)
glDisableVertexAttribArray(1)
self.shader.end()
if __name__ == "__main__":
win = Tu01Win()
win.init_opengl()
win.init_context()
win.run()