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Fixed collided 3D GPU particles sometimes jittering

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This commit is contained in:
Rudolph Bester
2024-05-28 14:09:08 +02:00
parent be56cab58c
commit f666c76a9c
2 changed files with 15 additions and 11 deletions
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12
servers/rendering/renderer_rd/shaders/particles.glsl
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@@ -528,11 +528,13 @@ void main() {
vec3 rel_vec = PARTICLE.xform[3].xyz - FRAME.colliders[i].transform[3].xyz;
vec3 local_pos = rel_vec * mat3(FRAME.colliders[i].transform);
// Allowing for a small epsilon to allow particle just touching colliders to count as collided
const float EPSILON = 0.001;
switch (FRAME.colliders[i].type) {
case COLLIDER_TYPE_SPHERE: {
float d = length(rel_vec) - (particle_size + FRAME.colliders[i].extents.x);
if (d < 0.0) {
if (d <= EPSILON) {
col = true;
depth = -d;
normal = normalize(rel_vec);
@@ -549,7 +551,7 @@ void main() {
vec3 closest = min(abs_pos, FRAME.colliders[i].extents);
vec3 rel = abs_pos - closest;
depth = length(rel) - particle_size;
if (depth < 0.0) {
if (depth <= EPSILON) {
col = true;
normal = mat3(FRAME.colliders[i].transform) * (normalize(rel) * sgn_pos);
depth = -depth;
@@ -588,10 +590,10 @@ void main() {
float s = texture(sampler3D(sdf_vec_textures[FRAME.colliders[i].texture_index], SAMPLER_LINEAR_CLAMP), uvw_pos).r;
s *= FRAME.colliders[i].scale;
s += extra_dist;
if (s < particle_size) {
if (s <= particle_size + EPSILON) {
col = true;
depth = particle_size - s;
const float EPSILON = 0.001;
normal = mat3(FRAME.colliders[i].transform) *
normalize(
vec3(
@@ -614,7 +616,7 @@ void main() {
float y = texture(sampler2D(height_field_texture, SAMPLER_LINEAR_CLAMP), uvw_pos.xz).r;
if (y > uvw_pos.y) {
if (y + EPSILON >= uvw_pos.y) {
//inside heightfield
vec3 pos1 = (vec3(uvw_pos.x, y, uvw_pos.z) * 2.0 - 1.0) * FRAME.colliders[i].extents;