Programming/openGL

glulookat / gluperspective / glfrustrum / glortho

구차니 2019. 5. 30. 19:04

다른 유틸리티를 같은 레벨로 봤군...

gluLookAt과 gluPerspective는 카메라를 조작하는 방법인데

glu로 시작하듯 gl Utility 계열이고

gl로 시작하는 glFrustum 과 glOrtho는

프로젝션 뷰를 perspective와 orthogonal로 설정하도록 한다.

 

Name
gluLookAt — define a viewing transformation

C Specification
void gluLookAt( GLdouble eyeX,
  GLdouble eyeY,
  GLdouble eyeZ,
  GLdouble centerX,
  GLdouble centerY,
  GLdouble centerZ,
  GLdouble upX,
  GLdouble upY,
  GLdouble upZ);

[링크 : https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluLookAt.xml]

 

Name
gluPerspective — set up a perspective projection matrix

C Specification
void gluPerspective( GLdouble fovy,
  GLdouble aspect,
  GLdouble zNear,
  GLdouble zFar);

[링크 : https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/gluPerspective.xml]

 

Name
glFrustum — multiply the current matrix by a perspective matrix

C Specification
void glFrustum( GLdouble left,
  GLdouble right,
  GLdouble bottom,
  GLdouble top,
  GLdouble nearVal,
  GLdouble farVal);

[링크 : h]ttps://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glFrustum.xml]

 

Name
glOrtho — multiply the current matrix with an orthographic matrix

C Specification
void glOrtho( GLdouble left,
  GLdouble right,
  GLdouble bottom,
  GLdouble top,
  GLdouble nearVal,
  GLdouble farVal);

[링크 : https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glOrtho.xml]

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