1#include <metal_stdlib> 2#include <simd/simd.h> 3using namespace metal; 4struct Inputs { 5}; 6struct Outputs { 7 float4 sk_Position [[position]]; 8 float2 vcoord_Stage0 [[user(locn1)]]; 9 float sk_PointSize [[point_size]]; 10}; 11vertex Outputs vertexMain(Inputs _in [[stage_in]], uint sk_VertexID [[vertex_id]], uint sk_InstanceID [[instance_id]]) { 12 Outputs _out; 13 (void)_out; 14 int x = sk_InstanceID % 200; 15 int y = sk_InstanceID / 200; 16 int ileft = (sk_InstanceID * 929) % 17; 17 int iright = (ileft + 1) + (sk_InstanceID * 1637) % (17 - ileft); 18 int itop = (sk_InstanceID * 313) % 17; 19 int ibot = (itop + 1) + (sk_InstanceID * 1901) % (17 - itop); 20 float outset = 0.03125; 21 outset = 0 == (x + y) % 2 ? -outset : outset; 22 float l = float(ileft) / 16.0 - outset; 23 float r = float(iright) / 16.0 + outset; 24 float t = float(itop) / 16.0 - outset; 25 float b = float(ibot) / 16.0 + outset; 26 float2 vertexpos; 27 vertexpos.x = float(x) + (0 == sk_VertexID % 2 ? l : r); 28 vertexpos.y = float(y) + (0 == sk_VertexID / 2 ? t : b); 29 _out.vcoord_Stage0.x = float(0 == sk_VertexID % 2 ? -1 : 1); 30 _out.vcoord_Stage0.y = float(0 == sk_VertexID / 2 ? -1 : 1); 31 _out.sk_Position = float4(vertexpos.x, vertexpos.y, 0.0, 1.0); 32 return _out; 33} 34