Next-Gen shaders (2008)
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This document discusses various game programming techniques focusing on next-gen shaders, including post-processing effects like blur, depth of field, and HDR rendering. It outlines methods for enhancing graphics through Gaussian blur, edge detection, and parallax mapping. The document also references key resources for shader programming and techniques used in game development.
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Gaussian Blur
// f(x) = a*e^-((x-b)^2)/r
// a = 1; b = 0; r = radius;
// f(x) = pow(e, -(x)^2/r)
weights[i*width + j] = pow(E, -pow(dist, 2.0)*_1_over_r) );
// usually just have a precomputed table
float4 PostProcessPS(float2 Tex : TEXCOORD0) : COLOR0
{
float4 Color = 0;
for (int i = 0; i < m_KernelSize; i++)
{
Color += tex2D(m_SrcColor,
Tex + TexelKernel[i].xy ) * weights[i];
}
return Color;
}](https://image.slidesharecdn.com/nextgenshaders-161230172252/85/Next-Gen-shaders-2008-4-320.jpg)
Next-Gen shaders (2008)
- 1. 1 Game Programming Tricks Part I Next-Gen Shaders Korhan Bircan April 8th, 2008
- 3. 3 Post Processing Effects Blur – Combine pixel color with surrounding pixel colors Motion Blur – Combine current frame with previous frame(s) Depth of Field – Blur pixel based on their depth value HDR effects – Bloom, lens flare etc. Magnify bright spots Edge Glow – Find edges and blur them Parallax Mapping – improved bump mapping
- 4. 4 Gaussian Blur // f(x) = a*e^-((x-b)^2)/r // a = 1; b = 0; r = radius; // f(x) = pow(e, -(x)^2/r) weights[i*width + j] = pow(E, -pow(dist, 2.0)*_1_over_r) ); // usually just have a precomputed table float4 PostProcessPS(float2 Tex : TEXCOORD0) : COLOR0 { float4 Color = 0; for (int i = 0; i < m_KernelSize; i++) { Color += tex2D(m_SrcColor, Tex + TexelKernel[i].xy ) * weights[i]; } return Color; }
- 13. 13
- 14. 14 Haze
- 15. 15 Haze
- 16. 16 Haze
- 18. 18 Haze
- 19. 19 Haze – Particle System
- 20. 20 High Dynamic Range (HDR) Rendering
- 21. 21 HDR Rendering
- 22. 22 HDR Rendering •down filter 4x •bright pass •bloom horizontal •bloom vertical •up filter 4x •combine
- 23. 23 HDR Rendering
- 25. 25 Glow •edge detection •down filter 4x •blur horizontal •blur vertical •combine 4x
- 26. 26 Light Streaks
- 27. 27 Lens Flare
- 28. 28 Parallax Mapping diffuse shading bump mapping parallax mapping
- 29. 29 Bump Mapping texture map height map bump map
- 30. 30 Parallax Mapping bump mapping: naive parallax mapping:
- 33. 33 References •Shaders for Game Programmers and Artists, Sebastian St-Laurent •Programming Vertex and Pixel Shaders, Wolfgang Engel •DirectX SDK Documentation •NVIDIA Gpu Gems Series •Steep Parallax Mapping, Morgan McGuire, Max McGuire