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50 lines
1.7 KiB
GLSL
50 lines
1.7 KiB
GLSL
uniform int idx;
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uniform float3x2 um;
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struct PS_OUTPUT
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{
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float4 Color : SV_Target0;
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};
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PS_OUTPUT main()
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{
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// matrices of 3 rows, 2 columns (regardless of row vs col major storage)
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const float3x2 m1 = { { 10, 11 }, // row-wise initialization
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{ 12, 13 },
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{ 14, 15 } };
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const float3x2 m2 = { 20, 21, 22, 23, 24, 25 }; // component-wise matrix initialization is allowed
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const float3x2 m3 = { 30, 31, 33, 33, 34, 35 }; // component-wise matrix initialization is allowed
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// These can be observed in the AST post-const folding to ensure we obtain the right value,
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// as given in comments to the right of each line. Note that the first indirection into a
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// matrix returns a row vector.
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float e1_00 = m1[0][0]; // 10
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float e1_01 = m1[0][1]; // 11
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float e1_10 = m1[1][0]; // 12
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float e1_11 = m1[1][1]; // 13
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float e1_20 = m1[2][0]; // 14
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float e1_21 = m1[2][1]; // 15
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float e2_00 = m2[0][0]; // 20
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float e2_01 = m2[0][1]; // 21
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float e2_10 = m2[1][0]; // 22
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float e2_11 = m2[1][1]; // 23
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float e2_20 = m2[2][0]; // 24
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float e2_21 = m2[2][1]; // 25
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// float e3a_00 = m3._m00; // TODO... also as an lvalue for a non-const matrix
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// float e3b_00 = m3._11; // TODO... also as an lvalue for a non-const matrix
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float2 r0a = m1[0]; // row0: 10,11: types must match: constant index into constant
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float2 r1a = m1[1]; // row1: 12,13: ...
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float2 r2a = m1[2]; // row2: 14,15: ...
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float2 r0b = m2[idx]; // types should match: variable index into constant
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float2 r0c = um[idx]; // types should match: variable index into variable
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PS_OUTPUT psout;
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psout.Color = e2_11; // 23
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return psout;
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}
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