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Beppe Vanrolleghem
2025-04-26 03:49:58 +02:00
parent b0fffcf4a9
commit 053f15e28e
1 changed files with 21 additions and 10 deletions
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31
experiments/cubes/main.frag
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@@ -51,8 +51,13 @@ float sceneSDF(vec3 ray) {
float boxSDF(vec3 p, vec3 b)
{
vec3 q = abs(p) - b;
return length(max(q,0.0)) + min(max(q.x,max(q.y,q.z)),0.0);
float e = .01;
p = abs(p )-b;
vec3 q = abs(p+e)-e;
return min(min(
length(max(vec3(p.x,q.y,q.z),0.0))+min(max(p.x,max(q.y,q.z)),0.0),
length(max(vec3(q.x,p.y,q.z),0.0))+min(max(q.x,max(p.y,q.z)),0.0)),
length(max(vec3(q.x,q.y,p.z),0.0))+min(max(q.x,max(q.y,p.z)),0.0));
}
mat4 rotateY(float theta) {
@@ -84,8 +89,8 @@ mat4 rotation3d(vec3 axis, float angle) {
float rayMarch(vec3 ro, vec3 rd, float start, float end, vec4 rot) {
float MAX_MARCHING_STEPS = 250.;
float EPSILON = 0.1;
float MAX_MARCHING_STEPS = 15.;
float EPSILON = 0.0001;
float depth = start;
for (float i = 0.; i < MAX_MARCHING_STEPS; i++) {
vec3 p = ro + depth * rd;
@@ -104,12 +109,18 @@ void main() {
float temp = 0.;
vec3 ro = vec3(0, 0, 5); //ray origin
vec3 rd = normalize(vec3(st, -1)); //ray direction
float d = rayMarch(ro+vec3(0,.2,.0), rd, 0.,100.,vec4(.4,.8,-.9,.4));
d = min(d,rayMarch(ro+vec3(-.2,.0,.0), rd, 0.,100.,vec4(.2,.1,.3,.9)));
d = min(d,rayMarch(ro+vec3(-.2,-.8,.0), rd, 0.,100.,vec4(.2,.1,.3,.9)));
d = min(d,rayMarch(ro+vec3(-.2,.3,.0), rd, 0.,100.,vec4(.2,.1,.3,.9)));
d = min(d,rayMarch(ro+vec3(-.2,.0,-.8), rd, 0.,100.,vec4(.2,.1,.3,.9)));
d = 1.-d/7.;
float via = cos(3.*u_time) /2.+.5;
float vib = cos(.5*u_time) /2.+.5;
float vic = cos(1.2*u_time) /2.+.5;
float vid = sin(2.*u_time) /2.+.5;
float vie = cos(8.*u_time) /2.+.5;
float d = rayMarch(ro+vec3(0,.2,-.4), rd, 0.,100.,vec4(.4,.8,-.9,4.)*via);
d = min(d,rayMarch(ro+vec3(-.2,.0,.02), rd, 0.,100.,vec4(.2,.1,.3,1.)*vib));
d = min(d,rayMarch(ro+vec3(-.9,-.9,-1.0), rd, 0.,100.,vec4(.2,.8,.3,1.2)*vic));
d = min(d,rayMarch(ro+vec3(.9,.3,.0), rd, 0.,100.,vec4(.2,.1,.3,.1)*vid));
d = min(d,rayMarch(ro+vec3(-.2,.9,-.8), rd, 0.,100.,vec4(.7,.1,.3,.9)*vie));
d = 1.-d/12.5;
d = stroke(d, .6, .01);
vec3 col = vec3(d);
if (d > 100.0) {
//col = vec3(0.1);