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Shaders
Rasmus Vahtra, Andres Traks
What is a shader?
Maybe this thing?
Shaders Rasmus Vahtra, Andres Traks What is a shader? Maybe this - - PowerPoint PPT Presentation
Shaders Rasmus Vahtra, Andres Traks What is a shader? Maybe this - - PowerPoint PPT Presentation
Shaders Rasmus Vahtra, Andres Traks What is a shader? Maybe this thing? Shader definition Computer program that is used to do shading So what exactly do they do? Calculate rendering effects on graphics hardware Allows customized
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Shader definition
Computer program that is used to do shading
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So what exactly do they do?
- Calculate rendering effects on graphics hardware
- Allows customized effects
○ Hue ○ Saturation ○ Brightness ○ Contrast
Everything on the fly!
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Basics of graphics pipeline (from shaders’ POV)
CPU GPU Geometry is formed (vertex shader) Geometry shader Tessellation shader Geometry is triangulated Fragment shader Depth test Rendering frame
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Shader types
- Vertex shaders - describe vertices (position, texture, colours)
- Geometry shader
- Tessellation shader
- Fragment shaders (Pixel shaders) - describe pixels (colour, depth)
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Geometry shader
Performs tasks that vertex nor pixel shaders can’t really do
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Tessellation shader
Takes geometry and starts splitting surfaces into smaller and smaller triangles, thus making things smoother
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Shaders: Low
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Shaders: Medium
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Shaders: High
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Shaders: Low
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Shaders: Medium
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Shaders: High