UnityObjectToClipPos()

What does function UnityObjectToClipPos() ???

 

CGIncludes\UnityCG.cginc line #153 from the 5.4 beta built in shader source

Code (CSharp):

1. // Tranforms position from object to homogenous space
2. inline float4 UnityObjectToClipPos( in float3 pos )
3. {
4. #if defined(UNITY_SINGLE_PASS_STEREO) || defined(UNITY_USE_CONCATENATED_MATRICES)
5.     // More efficient than computing M*VP matrix product
6.     return mul(UNITY_MATRIX_VP, mul(unity_ObjectToWorld, float4(pos, 1.0)));
7. #else
8.     return mul(UNITY_MATRIX_MVP, float4(pos, 1.0));
9. #endif
10. }

 

this is not helping much

 

Basically it converts a coordinate vector from object space to clip space.

https://learnopengl.com/Getting-started/Coordinate-Systems

Clip Space is kinda like Screen Space, but can be different if you have a different viewport set up. Anything outside -1 ~ +1 is clipped.