所以我开始学习OpenGL,阅读“OpenGL Super Bible 5 ed.”一书.它解释得非常好,我自己也能够创建我的第一个gl程序！简单的东西,一个旋转的三维金字塔.
现在由于某种原因,其中一个面不会渲染.我检查了椎体(首先在纸上绘制)并且看起来是正确的.如果我更改着色器以绘制线环,则会发现它会渲染.但是它不会呈现三角形.有人可以解释为什么吗
void setupRC()
{
glClearColor(0.0f,0.0f,1.0f);
shaderManager.InitializeStockShaders();
M3DVector3f vVerts1[] = {-0.5f,-0.5f,0.5f,-0.5f};
M3DVector3f vVerts2[] = {-0.5f,0.5f};
M3DVector3f vVerts3[] = {-0.5f,0.5f};
M3DVector3f vVerts4[] = {0.5f,-0.5f};
triangleBatch1.Begin(GL_LINE_LOOP,3);
triangleBatch1.CopyVertexData3f(vVerts1);
triangleBatch1.End();
triangleBatch2.Begin(GL_TRIANGLES,3);
triangleBatch2.CopyVertexData3f(vVerts2);
triangleBatch2.End();
triangleBatch3.Begin(GL_TRIANGLES,3);
triangleBatch3.CopyVertexData3f(vVerts3);
triangleBatch3.End();
triangleBatch4.Begin(GL_TRIANGLES,3);
triangleBatch4.CopyVertexData3f(vVerts4);
triangleBatch4.End();
glEnable(GL_CULL_FACE);
}
float rot = 1;
void renderScene()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
GLfloat vRed[] = {1.0f,0.5f};
GLfloat vBlue[] = {0.0f,1.0f,0.5f};
GLfloat vGreen[] = {0.0f,0.5f};
GLfloat vWhite[] = {1.0f,0.5f};
M3DMatrix44f transformMatrix;
if (rot >= 360)
rot = 0;
else
rot = rot + 1;
m3dRotationMatrix44(transformMatrix,m3dDegToRad(rot),0.0f);
shaderManager.UseStockShader(GLT_SHADER_FLAT,transformMatrix,vRed);
triangleBatch1.Draw();
shaderManager.UseStockShader(GLT_SHADER_FLAT,vBlue);
triangleBatch2.Draw();
shaderManager.UseStockShader(GLT_SHADER_FLAT,vGreen);
triangleBatch3.Draw();
shaderManager.UseStockShader(GLT_SHADER_FLAT,vWhite);
triangleBatch4.Draw();
glutSwapBuffers();
glutPostRedisplay();
Sleep(10);
}
