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Fix ComputeBoids (#214) 

I know there was some churn on which version of this shader was correct - but right now, this goes from broken on all 4 backends to working on all 4 backends. So this seems better.

The old code (accidentally?) uses descriptor arrays (I think), which are not trivial to support on all backends, so we won't use them for now.
This commit is contained in:
Kai Ninomiya 2018-07-10 11:01:28 -07:00 committed by GitHub
parent 6c639c991e
commit 7883e7e59c
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1 changed files with 10 additions and 10 deletions
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20
examples/ComputeBoids.cpp
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@ -154,12 +154,12 @@ void initSim() {
} params;
layout(std140, set = 0, binding = 1) buffer ParticlesA {
Particle particle;
} particlesA[1000];
Particle particles[1000];
} particlesA;
layout(std140, set = 0, binding = 2) buffer ParticlesB {
Particle particle;
} particlesB[1000];
Particle particles[1000];
} particlesB;
void main() {
// https://github.com/austinEng/Project6-Vulkan-Flocking/blob/master/data/shaders/computeparticles/particle.comp
@ -167,8 +167,8 @@ void initSim() {
uint index = gl_GlobalInvocationID.x;
if (index >= params.particleCount) { return; }
vec2 vPos = particlesA[index].particle.pos;
vec2 vVel = particlesA[index].particle.vel;
vec2 vPos = particlesA.particles[index].pos;
vec2 vVel = particlesA.particles[index].vel;
vec2 cMass = vec2(0.0, 0.0);
vec2 cVel = vec2(0.0, 0.0);
@ -180,8 +180,8 @@ void initSim() {
vec2 vel;
for (int i = 0; i < params.particleCount; ++i) {
if (i == index) { continue; }
pos = particlesA[i].particle.pos.xy;
vel = particlesA[i].particle.vel.xy;
pos = particlesA.particles[i].pos.xy;
vel = particlesA.particles[i].vel.xy;
if (distance(pos, vPos) < params.rule1Distance) {
cMass += pos;
@ -216,10 +216,10 @@ void initSim() {
if (vPos.y < -1.0) vPos.y = 1.0;
if (vPos.y > 1.0) vPos.y = -1.0;
particlesB[index].particle.pos = vPos;
particlesB.particles[index].pos = vPos;
// Write back
particlesB[index].particle.vel = vVel;
particlesB.particles[index].vel = vVel;
}
)");