99 lines
2.6 KiB
HLSL
99 lines
2.6 KiB
HLSL
Texture2D xTexture;
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sampler TextureSampler = sampler_state { Texture = <xTexture>; };
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float4x4 xTransform;
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const int MaxDeformResolution = 15 * 15;
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float2 deformArray[15 * 15];
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int deformArrayWidth;
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int deformArrayHeight;
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float2 uvTopLeft;
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float2 uvBottomRight;
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float4 tintColor;
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float4 solidColor;
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struct VertexShaderInput
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{
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float4 Position : SV_POSITION;
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float4 Color : COLOR0;
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float2 TexCoords: TEXCOORD0;
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};
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struct VertexShaderOutput
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{
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float4 Position : SV_POSITION;
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float4 Color : COLOR0;
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float2 TexCoords: TEXCOORD0;
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};
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VertexShaderOutput mainVS(in VertexShaderInput input)
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{
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VertexShaderOutput output = (VertexShaderOutput)0;
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float2 normalizedUv = (input.TexCoords - uvTopLeft) / (uvBottomRight - uvTopLeft);
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int2 deformIndexTopLeft =
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{
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min(floor(normalizedUv.x * (deformArrayWidth - 1)), deformArrayWidth - 1),
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min(floor(normalizedUv.y * (deformArrayHeight - 1)), deformArrayHeight - 1)
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};
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int2 deformIndexBottomRight =
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{
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min(deformIndexTopLeft.x + 1, deformArrayWidth - 1),
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min(deformIndexTopLeft.y + 1, deformArrayHeight - 1)
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};
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float2 deformTopLeft = deformArray[deformIndexTopLeft.x + deformIndexTopLeft.y * deformArrayWidth];
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float2 deformTopRight = deformArray[deformIndexBottomRight.x + deformIndexTopLeft.y * deformArrayWidth];
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float2 deformBottomLeft = deformArray[deformIndexTopLeft.x + deformIndexBottomRight.y * deformArrayWidth];
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float2 deformBottomRight = deformArray[deformIndexBottomRight.x + deformIndexBottomRight.y * deformArrayWidth];
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float divX = 1.0 / (deformArrayWidth - 1);
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float divY = 1.0 / (deformArrayHeight - 1);
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float2 vertexOffset =
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{
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lerp(
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lerp(deformTopLeft, deformTopRight, (normalizedUv.x % divX) / divX),
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lerp(deformBottomLeft, deformBottomRight, (normalizedUv.x % divX) / divX),
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(normalizedUv.y % divY) / divY)
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};
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output.Position = mul(input.Position + float4(vertexOffset, 0, 0), xTransform);
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output.Color = input.Color * tintColor;
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output.TexCoords = input.TexCoords;
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return output;
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}
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float4 mainPS(VertexShaderOutput input) : COLOR
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{
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return xTexture.Sample(TextureSampler, input.TexCoords) * input.Color;
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}
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float4 solidColorPS(VertexShaderOutput input) : COLOR
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{
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return solidColor * xTexture.Sample(TextureSampler, input.TexCoords).a;
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}
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technique DeformShader
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{
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pass Pass1
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{
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VertexShader = compile vs_4_0_level_9_1 mainVS();
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PixelShader = compile ps_4_0_level_9_1 mainPS();
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}
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}
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technique DeformShaderSolidColor
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{
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pass Pass1
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{
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VertexShader = compile vs_4_0_level_9_1 mainVS();
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PixelShader = compile ps_4_0_level_9_1 solidColorPS();
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}
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} |