forked from Mirrorlandia_minetest/irrlicht
b4b28c367c
S3DVertexTangents also documents that it's passed as TEXCOORD1 and TEXCOORD2, but easy to miss, so added some comments to the hlsl shader. Also not all materials work well as base materials. git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@6452 dfc29bdd-3216-0410-991c-e03cc46cb475
90 lines
2.9 KiB
HLSL
90 lines
2.9 KiB
HLSL
// Part of the Irrlicht Engine Shader example.
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// These simple Direct3D9 pixel and vertex shaders will be loaded by the shaders
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// example. Please note that these example shaders don't do anything really useful.
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// They only demonstrate that shaders can be used in Irrlicht.
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//-----------------------------------------------------------------------------
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// Global variables
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//-----------------------------------------------------------------------------
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float4x4 mWorldViewProj; // World * View * Projection transformation
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float4x4 mInvWorld; // Inverted world matrix
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float4x4 mTransWorld; // Transposed world matrix
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float3 mLightPos; // Light position (actually just camera-pos in this case)
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float4 mLightColor; // Light color
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// Vertex shader output structure
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struct VS_OUTPUT
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{
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float4 Position : POSITION; // vertex position
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float4 Diffuse : COLOR0; // vertex diffuse color
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float2 TexCoord : TEXCOORD0; // tex coords
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// float3 Tangent : TEXCOORD1; // Not used in this example, but additional values can be passed on as tex coords
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// float3 Binormal : TEXCOORD2; // Not used in this example, but additional values can be passed on as tex coords
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};
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VS_OUTPUT vertexMain( in float4 vPosition : POSITION
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, in float3 vNormal : NORMAL
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, float2 texCoord : TEXCOORD0
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//,float3 Tangent : TEXCOORD1; // Used for Tangent when working with S3DVertexTangents
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//,float3 Binormal : TEXCOORD2; // Used for Binormal when working with S3DVertexTangents
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)
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{
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VS_OUTPUT Output;
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// transform position to clip space
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Output.Position = mul(vPosition, mWorldViewProj);
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// transform normal somehow (NOTE: for the real vertex normal you would use an inverse-transpose world matrix instead of mInvWorld)
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float3 normal = mul(float4(vNormal,0.0), mInvWorld);
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// renormalize normal
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normal = normalize(normal);
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// position in world coordinates (NOTE: not sure why transposed world is used instead of world?)
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float3 worldpos = mul(mTransWorld, vPosition);
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// calculate light vector, vtxpos - lightpos
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float3 lightVector = worldpos - mLightPos;
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// normalize light vector
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lightVector = normalize(lightVector);
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// calculate light color
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float3 tmp = dot(-lightVector, normal);
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tmp = lit(tmp.x, tmp.y, 1.0);
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tmp = mLightColor * tmp.y;
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Output.Diffuse = float4(tmp.x, tmp.y, tmp.z, 0);
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Output.TexCoord = texCoord;
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return Output;
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}
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// Pixel shader output structure
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struct PS_OUTPUT
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{
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float4 RGBColor : COLOR0; // Pixel color
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};
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sampler2D myTexture;
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PS_OUTPUT pixelMain(float2 TexCoord : TEXCOORD0,
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float4 Position : POSITION,
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float4 Diffuse : COLOR0 )
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{
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PS_OUTPUT Output;
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float4 col = tex2D( myTexture, TexCoord ); // sample color map
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// multiply with diffuse and do other senseless operations
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Output.RGBColor = Diffuse * col;
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Output.RGBColor *= 4.0;
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return Output;
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}
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