| #include <metal_stdlib> |
| #include <simd/simd.h> |
| using namespace metal; |
| struct Inputs { |
| }; |
| struct Outputs { |
| float4 sk_FragColor [[color(0)]]; |
| }; |
| struct Globals { |
| float4x4 a; |
| }; |
| |
| float4x4 float4x4_inverse(float4x4 m) { |
| float a00 = m[0][0], a01 = m[0][1], a02 = m[0][2], a03 = m[0][3]; |
| float a10 = m[1][0], a11 = m[1][1], a12 = m[1][2], a13 = m[1][3]; |
| float a20 = m[2][0], a21 = m[2][1], a22 = m[2][2], a23 = m[2][3]; |
| float a30 = m[3][0], a31 = m[3][1], a32 = m[3][2], a33 = m[3][3]; |
| float b00 = a00*a11 - a01*a10; |
| float b01 = a00*a12 - a02*a10; |
| float b02 = a00*a13 - a03*a10; |
| float b03 = a01*a12 - a02*a11; |
| float b04 = a01*a13 - a03*a11; |
| float b05 = a02*a13 - a03*a12; |
| float b06 = a20*a31 - a21*a30; |
| float b07 = a20*a32 - a22*a30; |
| float b08 = a20*a33 - a23*a30; |
| float b09 = a21*a32 - a22*a31; |
| float b10 = a21*a33 - a23*a31; |
| float b11 = a22*a33 - a23*a32; |
| float det = b00*b11 - b01*b10 + b02*b09 + b03*b08 - b04*b07 + b05*b06; |
| return float4x4(a11*b11 - a12*b10 + a13*b09, |
| a02*b10 - a01*b11 - a03*b09, |
| a31*b05 - a32*b04 + a33*b03, |
| a22*b04 - a21*b05 - a23*b03, |
| a12*b08 - a10*b11 - a13*b07, |
| a00*b11 - a02*b08 + a03*b07, |
| a32*b02 - a30*b05 - a33*b01, |
| a20*b05 - a22*b02 + a23*b01, |
| a10*b10 - a11*b08 + a13*b06, |
| a01*b08 - a00*b10 - a03*b06, |
| a30*b04 - a31*b02 + a33*b00, |
| a21*b02 - a20*b04 - a23*b00, |
| a11*b07 - a10*b09 - a12*b06, |
| a00*b09 - a01*b07 + a02*b06, |
| a31*b01 - a30*b03 - a32*b00, |
| a20*b03 - a21*b01 + a22*b00) * (1/det); |
| } |
| |
| fragment Outputs fragmentMain(Inputs _in [[stage_in]], bool _frontFacing [[front_facing]], float4 _fragCoord [[position]]) { |
| Globals _globals{{}}; |
| (void)_globals; |
| Outputs _out; |
| (void)_out; |
| _out.sk_FragColor = float4x4_inverse(_globals.a)[0]; |
| return _out; |
| } |