pssplat2.cg

etm2.2是基于Ogre引擎开发的地形库

void main
(
  float2 iTexCoord0 : TEXCOORD0,
 
  out float4 oColor : COLOR,
 
  uniform sampler2D covMap1,
  uniform sampler2D covMap2,
  uniform sampler2D splat1,
  uniform sampler2D splat2,
  uniform sampler2D splat3,
  uniform sampler2D splat4,
  uniform sampler2D splat5,
  uniform sampler2D splat6,

  uniform float splatScaleX,
  uniform float splatScaleZ
) 
{
  float3 cov1 = tex2D(covMap1, iTexCoord0).rgb;
  float3 cov2 = tex2D(covMap2, iTexCoord0).rgb;
  
  iTexCoord0.x *= splatScaleX;
  iTexCoord0.y *= splatScaleZ;
  
  oColor = tex2D(splat1, iTexCoord0) * cov1.x
           + tex2D(splat2, iTexCoord0) * cov1.y
           + tex2D(splat3, iTexCoord0) * cov1.z
           + tex2D(splat4, iTexCoord0) * cov2.x
           + tex2D(splat5, iTexCoord0) * cov2.y
           + tex2D(splat6, iTexCoord0) * cov2.z;

}