变换矩阵TransformationMatrix

参考

• https://blog.csdn.net/u014587123/article/details/80337627?depth_1-utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-1&utm_source=distribute.pc_relevant.none-task-blog-BlogCommendFromBaidu-1

• https://blog.csdn.net/xyh930929/article/details/83715368

  空间坐标系

  :::info

• 局部空间LocalSpace=物体空间ObjectSpace-物体坐标系(ObjectCoordinates)

• 世界空间WorldSpace-世界坐标系WorldCoordinates
• 观察空间ViewSpace=视觉空间EyeSpace-人眼坐标系EyeCoordinates
• 裁剪空间ClipSpace-裁剪坐标ClipCoordinates
• 标准化设备坐标NormalizedDeviceCoordinatesNDChttps://blog.csdn.net/CALL_LKC/article/details/81411034?utm_source=blogxgwz1

• 窗口=屏幕空间ScreenSpace窗口屏幕坐标WindowCoordinates=ScreenCoordinates :::

  矩阵

• glMatrixMode()选择当前操作矩阵模式

• glLoad*();加载矩阵
• glPushMatrix ();glPopMatrix ();矩阵堆栈

• 获取矩阵glGetFloat

  float mat[16];
  glGetFloatv(GL_MODELVIEW_MATRIX, mat);
  for (int i = 0; i < 16; i++)
  {
    printf("%f ", mat[i]);
    if ((i+1) % 4 == 0)
    {
        printf("\n");
    }
  }

  模型变换ModelTransformation

• glTranslate*();``glScaled;``glRotated;

• 坐标 :::info

• 模型变换矩阵ModelMatrix

• 

• 

• 旋转矩阵 ::: 矩阵推导https://www.cnblogs.com/WangGuiHandsome/p/10094784.html

  视点变换

• gluLookAt;

• 坐标

• 视点变换矩阵ViewCameraMatrix

  投影变换

• glOrtho();``glFrustum();gluPerspective();

• 
• 
• 投影矩阵PROJECTIONMatrix
• 

  透视投影-近大远小正交投影

  

视口变换glViewport();