54 lines
No EOL
1.6 KiB
GLSL
54 lines
No EOL
1.6 KiB
GLSL
// Copyright 2020 Google LLC
|
|
|
|
struct VSInput
|
|
{
|
|
[[vk::location(0)]] float4 Pos : POSITION0;
|
|
[[vk::location(1)]] float4 Color : COLOR0;
|
|
[[vk::location(2)]] float Alpha : TEXCOORD0;
|
|
[[vk::location(3)]] float Size : TEXCOORD1;
|
|
[[vk::location(4)]] float Rotation : TEXCOORD2;
|
|
[[vk::location(5)]] int Type : TEXCOORD3;
|
|
};
|
|
|
|
struct VSOutput
|
|
{
|
|
float4 Pos : SV_POSITION;
|
|
[[vk::builtin("PointSize")]] float PSize : PSIZE;
|
|
[[vk::location(0)]] float4 Color : COLOR0;
|
|
[[vk::location(1)]] float Alpha : TEXCOORD0;
|
|
[[vk::location(2)]] int Type : TEXCOORD1;
|
|
[[vk::location(3)]] float Rotation : TEXCOORD2;
|
|
[[vk::location(4)]] float2 CenterPos : POSITION1;
|
|
[[vk::location(5)]] float PointSize : TEXCOORD3;
|
|
};
|
|
|
|
struct UBO
|
|
{
|
|
float4x4 projection;
|
|
float4x4 modelview;
|
|
float2 viewportDim;
|
|
float pointSize;
|
|
};
|
|
|
|
cbuffer ubo : register(b0) { UBO ubo; }
|
|
|
|
VSOutput main (VSInput input)
|
|
{
|
|
VSOutput output = (VSOutput)0;
|
|
output.Color = input.Color;
|
|
output.Alpha = input.Alpha;
|
|
output.Type = input.Type;
|
|
output.Rotation = input.Rotation;
|
|
|
|
output.Pos = mul(ubo.projection, mul(ubo.modelview, float4(input.Pos.xyz, 1.0)));
|
|
|
|
// Base size of the point sprites
|
|
float spriteSize = 8.0 * input.Size;
|
|
|
|
// Scale particle size depending on camera projection
|
|
float4 eyePos = mul(ubo.modelview, float4(input.Pos.xyz, 1.0));
|
|
float4 projectedCorner = mul(ubo.projection, float4(0.5 * spriteSize, 0.5 * spriteSize, eyePos.z, eyePos.w));
|
|
output.PointSize = output.PSize = ubo.viewportDim.x * projectedCorner.x / projectedCorner.w;
|
|
output.CenterPos = ((output.Pos.xy / output.Pos.w) + 1.0) * 0.5 * ubo.viewportDim;
|
|
return output;
|
|
} |