Add bouncy-blocks.glsl
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177
bouncy-blocks.glsl
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177
bouncy-blocks.glsl
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// RayMarcher001.glsl
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// original: http://glslsandbox.com/e#36017.0
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#ifdef GL_ES
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precision mediump float;
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#endif
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uniform float time;
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uniform vec2 mouse;
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uniform vec2 resolution;
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vec3 lightpos = vec3(0,0,1);
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vec3 rotatey(in vec3 p, float ang)
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{
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return vec3(p.x*cos(ang)-p.z*sin(ang), p.y, p.x*sin(ang)+p.z*cos(ang));
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}
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vec3 rotatex(in vec3 p, float ang)
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{
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return vec3(p.x, p.y*cos(ang)-p.z*sin(ang), p.y*sin(ang)+p.z*cos(ang));
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}
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vec3 rotatez(in vec3 p, float ang)
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{
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return vec3(p.x*cos(ang)-p.y*sin(ang), p.x*sin(ang)+p.y*cos(ang), p.z);
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}
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vec2 plane(in vec3 p, in vec3 n, float d, float obj)
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{
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n = normalize(n);
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return vec2(dot(p,n) + d, obj);
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}
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vec2 rbox(in vec3 p, in vec3 pos, in vec3 ang, float obj)
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{
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vec3 b = vec3(0.3,0.3,0.3);
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p -= pos;
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p = rotatey(p, ang.y*time);
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p = rotatex(p, ang.x*time);
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p = rotatez(p, ang.z*time);
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return vec2(length(max(abs(p)-b,0.0)) - 0.1, obj);
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}
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vec2 sph(in vec3 p, float r, float obj)
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{
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return vec2(length(p) - r, obj);
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}
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vec2 min2(vec2 o1, vec2 o2)
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{
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if (o1.x < o2.x)
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return o1;
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else
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return o2;
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}
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vec2 scene(in vec3 p)
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{
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vec2 d = plane(p, vec3(0,1.0,0), 0.9, 1.0);
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d = min2(d, plane(p, vec3(0,0.5,1), 1.0, 1.0));
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d = min2(d, sph(p+vec3(0.0, 0.2+sin(time*2.0),+0.0), 0.5+0.2*sin(time), 4.0));
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d = min2(d, rbox(p,vec3(+0.2+sin(time*2.0),+0.0,+0.0), vec3(0.5,-0.5,0.5), 3.0));
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d = min2(d, rbox(p,vec3(+0.5+sin(time*1.5),-0.2,-0.2), vec3(-0.5,0.25,0.65), 2.0));
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d = min2(d, rbox(p,vec3(+0.7,+0.3+sin(time*1.3),+0.5), vec3(-0.5,-0.65,1.5), 2.0));
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d = min2(d, rbox(p,vec3(-0.8,-0.2+sin(time),-0.0+sin(time)), vec3(0.2,0.5,0.5), 2.0));
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d = min2(d, rbox(p,vec3(+1.6,+0.5,-0.1+sin(time)), vec3(0.5,0.75,-0.5), 2.0));
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return d;
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}
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vec3 get_normal(in vec3 p)
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{
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vec3 eps = vec3(0.0001, 0, 0);
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float nx = scene(p + eps.xyy).x - scene(p - eps.xyy).x;
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float ny = scene(p + eps.yxy).x - scene(p - eps.yxy).x;
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float nz = scene(p + eps.yyx).x - scene(p - eps.yyx).x;
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return normalize(vec3(nx,ny,nz));
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}
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float softshadow(in vec3 ro, in vec3 rd)
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{
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vec3 pos = ro;
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float shade = 0.0;
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for (int i = 0; i < 8; i++) {
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vec2 d = scene(pos);
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pos += rd*d.x;
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shade += (1.0 - shade)*clamp(d.x, 0.0, 0.90);
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}
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return shade;
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}
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float ao(in vec3 ro, in vec3 rd)
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{
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vec3 pos = ro;
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float shade = 1.0;
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for (int i = 0; i < 5; i++) {
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vec2 d = scene(pos);
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pos += rd*d.x;
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shade -= d.x*pow(2.0, 0.5*float(i));
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}
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return shade;
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}
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vec3 rm2(in vec3 ro, in vec3 rd)
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{
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vec3 color = vec3(0.0);
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vec3 contrib = vec3(0);
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vec3 pos = ro;
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float dist = 0.0;
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vec2 d;
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for (int i = 0; i < 32; i++) {
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d = scene(pos);
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pos += rd*d.x*1.0;
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dist += d.x*1.0;
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if (dist < 100.0 && abs(d.x) < 0.010) {
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vec3 n = get_normal(pos);
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vec3 l = normalize(lightpos - pos);
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vec3 r = reflect(rd, n);
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float shade = 0.0;
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float diff = clamp(dot(n, l), 0.0, 1.0);
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float spec = pow(clamp(dot(r, l), 0.0, 1.0), 128.0);
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color += shade*vec3(1,1,1)+diff*vec3(1,1,1)*0.8 + spec*vec3(1,1,1);
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}
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}
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color /= 32.0;
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return color;
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}
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void main( void ) {
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// vec2 p = 2.0 * (gl_FragCoord.xy / resolution.xy) - 1.0;
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// p.x *= resolution.x / resolution.y;
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// p /= max(resolution.x, resolution.y) / 30.0;
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vec2 p = (gl_FragCoord.xy / max(resolution.x, resolution.y) - 0.5);
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// p.x *= resolution.x / resolution.y;
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// p *= time;
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p *= 2.;
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p.y += .7;
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vec3 color = vec3(0.0);
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vec3 contrib = vec3(0.0);
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vec3 ro = vec3(0.0,0,2.0);
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vec3 rd = normalize(vec3(p.x,p.y,-1.0));
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vec3 pos = ro;
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float dist = 0.0;
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vec2 d;
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for (int i = 0; i < 64; i++) {
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d = scene(pos);
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pos += rd*d.x*1.0;
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dist += d.x*1.0;
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}
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if (dist < 100.0 && d.x < 0.001) {
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vec3 n = get_normal(pos);
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vec3 l = normalize(lightpos - pos);
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vec3 r = reflect(rd, n);
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float diff = clamp(dot(n, l), 0.0, 1.0);
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float shade = smoothstep(0.0, 1.0, 1.0 - ao(pos+0.01*n, 0.5*n));
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float spec = pow(clamp(dot(r, l), 0.0, 1.0), 128.0);
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vec3 refl = rm2(pos+0.01*n, r);
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float shadow = clamp(softshadow(pos+0.01*n, l), -1.0, 1.0);
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if (d.y > 0.5 && d.y < 1.5) color += contrib+shadow*shade*vec3(1,1,1)+diff*vec3(1,1,1)*0.5;
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else if (d.y == 3.0) color += contrib+shadow*shade*vec3(0,1,1)+diff*vec3(0,1,1)*0.5 + spec*vec3(0,1,1)*1.0+refl*vec3(0,1,1)*0.4;
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else if (d.y == 4.0) color += contrib+shadow*shade*vec3(0.3,1,0.2)+diff*vec3(0,1,1)*0.5 + spec*vec3(0,1,1)*1.0+refl*vec3(0,1,1)*0.4;
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else color += contrib+shadow*shade*vec3(1,1,1)+diff*vec3(1,0,0)*0.5 + spec*vec3(1,1,1)*1.0+refl*vec3(1,1,1)*0.4;
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}
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gl_FragColor = vec4(color, 1.0);
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}
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