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<?xml version="1.0" encoding="UTF-8" ?>
<Effect>
<MetaData>
<!--Create an apparent streaking for rapidly moving objects in the layer.-->
<Property name="fadeAmount" formalName="Fade Amount" min="0" max="1" default=".05" description="0 = object trails persist\n1.0 = object trails fade out\nimmediately (no trail)" />
<Property name="GlowSampler" type="Texture" filter="nearest" clamp="clamp" />
<Property name="Sprite" type="Texture" filter="nearest" clamp="clamp" />
</MetaData>
<Shaders>
<Shared>
#include "blur.glsllib"
</Shared>
<Shader name="HBLUR">
<VertexShader>
void vert()
{
SetupHorizontalGaussianBlur3Tap( Texture0Info.x, 1.0, TexCoord );
}
</VertexShader>
<FragmentShader>
void frag()
{
vec4 src = texture2D_0(TexCoord);
float Trailfade = 1.0 - fadeAmount;
vec4 OutCol = GaussianBlur3TapPremultiplied( GlowSampler ) * Trailfade;
// change the color so that it looks different. saturate it a bit.
float srcSum = dot(vec3(1.0), src.rgb);
src.rgb = src.rgb * 0.7 + vec3(srcSum,srcSum,srcSum) * 0.3;
gl_FragColor.rgb = (1.0 - src.a) * OutCol.rgb + src.rgb;
gl_FragColor.a = src.a + OutCol.a;
}
</FragmentShader>
</Shader>
<Shader name="VBLUR">
<VertexShader>
void vert()
{
SetupVerticalGaussianBlur3Tap( Texture0Info.y, 1.0, TexCoord );
}
</VertexShader>
<FragmentShader>
void frag() // PS_Blur_Vertical
{
vec4 OutCol = GaussianBlur3TapPremultiplied( Texture0 );
gl_FragColor = OutCol;
}
</FragmentShader>
</Shader>
<Shader name="BLEND">
<FragmentShader>
void frag()
{
vec4 src = texture2D_0(TexCoord);
vec4 dst = texture2D_Sprite(TexCoord);
colorOutput(src * (1.0-dst.a) + dst);
}
</FragmentShader>
</Shader>
</Shaders>
<Passes>
<Buffer name="glow_buffer" type="ubyte" format="rgba" filter="linear" wrap="clamp" size=".25" lifetime="scene"/>
<Buffer name="temp_buffer" type="ubyte" format="rgba" filter="linear" wrap="clamp" size=".25" lifetime="frame"/>
<Pass name="1" shader="HBLUR" input="[source]" output="temp_buffer">
<BufferInput param="GlowSampler" value="glow_buffer"/>
</Pass>
<Pass name="2" shader="VBLUR" input="temp_buffer" output="glow_buffer"/>
<Pass name="pass3_Composite" shader="BLEND" input="glow_buffer">
<BufferInput param="Sprite" value="[source]"/>
</Pass>
</Passes>
</Effect>
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