Shader foundation 01

come from siki College shader Course

Drawcall  1000 individual , signify CPU by GPU Get ready 1000 Data , The calculation time is slow in the process of preparation , cause CPU load

GPU Streaming parallel computing mode , The calculation of any element in the stream does not depend on other data of the same type ,  High concurrency structure , Graphics processing and complex operation ratio CPU Efficient , Logical unit ALU many , Suitable for parallel processing of dense data

 

 

be based on OpenGL Of OpenGL Shading Language, abbreviation GLSL;

be based on DirectX Of High Level Shading Language, abbreviation HLSL; C++ Realization

also NVIDIA The company's C for Graphic, abbreviation Cg Language .C Most of the semantics of language

DrawCall,CPU call GPU Command communication of , Similar network cable bandwidth .mesh Grid merging , The same material and the same object , Is to reduce DrawCall, Reduce GPU and CPU Communication between

 

Data is obtained from video memory

 

 

 

 

Homogeneous clipping space , From the model to the world to the camera, through projection transformation to homogeneous space  

 

 

 

The farther away from the camera , The greater the depth value , Transparent objects cannot be written into the depth test , 

It is best to make a separate Atlas of transparent maps