沒有任何效果的截圖：
參考《Pro OGRE 3D Programming》Chapter 12: Ogre 2D and Compositing
HDR效果截圖，注意fps數的變化，相當大啊：
ogrenew\Samples\Media\materials\scripts\Examples.compositor文件中
HDR
除了rt_full，每個target都有對應的一個material腳本
// HDR
compositor HDR
{
// floating point only for now
technique
{
// Temporary textures
// Fullsize HDR render target, used as tone mapping source
texture rt_full target_width target_height PF_FLOAT16_RGB
// Targets used for luminance evaluation (3x3 downsample, point filtering)
texture rt_lum0 1 1 PF_FLOAT16_RGB
texture rt_lum1 4 4 PF_FLOAT16_RGB
texture rt_lum2 16 16 PF_FLOAT16_RGB
texture rt_lum3 64 64 PF_FLOAT16_RGB
texture rt_lum4 128 128 PF_FLOAT16_RGB
// Bright-pass filtered target (tone mapped)
texture rt_brightpass 128 128 PF_R8G8B8
// Bloom filter targets
texture rt_bloom0 128 128 PF_R8G8B8
texture rt_bloom1 128 128 PF_R8G8B8
target rt_full
{
// No input, render differently
input none
// Use float target HDR material scheme (unclamped shaders)
material_scheme HDR
pass clear
{
}
pass render_scene
{
}
}
// Downsample the original HDR scene to extract luminence value
target rt_lum4
{
input none
pass render_quad // hew:告訴渲染器把這個通路渲染到整個目標矩形區域中來
// hew:instruct the Compositor to render this pass to a full-target quad
{
// Downsample using a 2x2 filter and convert to greyscale
material Ogre/Compositor/HDR/Downsample2x2Luminence
input 0 rt_full
identifier 994
}
}
target rt_lum3
{
input none
pass render_quad
{
// Downsample using a 3x3 filter
material Ogre/Compositor/HDR/Downsample3x3
input 0 rt_lum4
identifier 993
}
}
target rt_lum2
{
input none
pass render_quad
{
// Downsample using a 3x3 filter
material Ogre/Compositor/HDR/Downsample3x3
input 0 rt_lum3
identifier 992
}
}
target rt_lum1
{
input none
pass render_quad
{
// Downsample using a 3x3 filter
material Ogre/Compositor/HDR/Downsample3x3
input 0 rt_lum2
identifier 991
}
}
target rt_lum0
{
input none
pass render_quad
{
// Downsample using a 3x3 filter
material Ogre/Compositor/HDR/Downsample3x3
input 0 rt_lum1
identifier 990
}
}
target rt_brightpass
{
input none
pass render_quad
{
// Downsample using a 3x3 filter, hi-pass and tone map
material Ogre/Compositor/HDR/Downsample3x3Brightpass
input 0 rt_full
input 1 rt_lum0
identifier 800
}
}
target rt_bloom1
{
input none
pass render_quad
{
// Blur horizontally
material Ogre/Compositor/HDR/GaussianBloom
input 0 rt_brightpass
identifier 701
}
}
target rt_bloom0
{
input none
pass render_quad
{
// Blur horizontally
material Ogre/Compositor/HDR/GaussianBloom
input 0 rt_bloom1
identifier 700
}
}
// Final output combines tone mapping of the original scene, with an
// exposure setting passed in as a GPU parameter, and an additive bloom
// effect
target_output
{
input none
pass render_quad
{
material Ogre/Compositor/HDR/ToneMapping
input 0 rt_full
input 1 rt_bloom0
input 2 rt_lum0
}
}
}
}
看完了書上的介紹還是很迷糊
DxSDK里面有個HDRPipeline的例子，結合那個看看
posted on 2008-05-04 22:50
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