mirror of https://github.com/axmolengine/axmol.git
499 lines
17 KiB
C
499 lines
17 KiB
C
|
/****************************************************************************
|
||
|
|
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
|
||
|
|
|
||
|
|
http://www.cocos2d-x.org
|
||
|
|
|
||
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
of this software and associated documentation files (the "Software"), to deal
|
||
|
|
in the Software without restriction, including without limitation the rights
|
||
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
copies of the Software, and to permit persons to whom the Software is
|
||
|
|
furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
The above copyright notice and this permission notice shall be included in
|
||
|
|
all copies or substantial portions of the Software.
|
||
|
|
|
||
|
|
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
||
|
|
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
THE SOFTWARE.
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
#define STRINGIFY(A) #A
|
||
|
|
|
||
|
|
static const char* starFlame = STRINGIFY(
|
||
|
|
|
||
|
|
|
||
|
|
uniform vec2 center;
|
||
|
|
uniform vec2 resolution;
|
||
|
|
|
||
|
|
|
||
|
|
vec2 iResolution = resolution; // viewport resolution (in pixels)
|
||
|
|
float iGlobalTime = CC_Time[1]; // shader playback time (in seconds)
|
||
|
|
//uniform float iChannelTime[4]; // channel playback time (in seconds)
|
||
|
|
//uniform vec3 iChannelResolution[4]; // channel resolution (in pixels)
|
||
|
|
vec4 iMouse = vec4(0,0,0,0); // mouse pixel coords. xy: current (if MLB down), zw: click
|
||
|
|
//uniform sampler2D iChannel0; // input channel. XX = 2D/Cube
|
||
|
|
|
||
|
|
float noise(vec3 p) //Thx to Las^Mercury
|
||
|
|
{
|
||
|
|
vec3 i = floor(p);
|
||
|
|
vec4 a = dot(i, vec3(1., 57., 21.)) + vec4(0., 57., 21., 78.);
|
||
|
|
vec3 f = cos((p-i)*acos(-1.))*(-.5)+.5;
|
||
|
|
a = mix(sin(cos(a)*a),sin(cos(1.+a)*(1.+a)), f.x);
|
||
|
|
a.xy = mix(a.xz, a.yw, f.y);
|
||
|
|
return mix(a.x, a.y, f.z);
|
||
|
|
}
|
||
|
|
|
||
|
|
float sphere(vec3 p, vec4 spr)
|
||
|
|
{
|
||
|
|
return length(spr.xyz-p) - spr.w;
|
||
|
|
}
|
||
|
|
|
||
|
|
float flame(vec3 p)
|
||
|
|
{
|
||
|
|
float d = sphere(p*vec3(1.,.5,1.), vec4(.0,-1.,.0,1.));
|
||
|
|
return d + (noise(p+vec3(.0,iGlobalTime*2.,.0)) + noise(p*3.)*.5)*.25*(p.y) ;
|
||
|
|
}
|
||
|
|
|
||
|
|
float scene(vec3 p)
|
||
|
|
{
|
||
|
|
return min(100.-length(p) , abs(flame(p)) );
|
||
|
|
}
|
||
|
|
|
||
|
|
vec4 raymarch(vec3 org, vec3 dir)
|
||
|
|
{
|
||
|
|
float d = 0.0 ;
|
||
|
|
float glow = 0.0;
|
||
|
|
float eps = 0.02;
|
||
|
|
vec3 p = org;
|
||
|
|
bool glowed = false;
|
||
|
|
|
||
|
|
for(int i=0; i<64; i++)
|
||
|
|
{
|
||
|
|
d = scene(p) + eps;
|
||
|
|
p += d * dir;
|
||
|
|
if( d>eps )
|
||
|
|
{
|
||
|
|
if(flame(p) < .0)
|
||
|
|
glowed=true;
|
||
|
|
if(glowed)
|
||
|
|
glow = float(i)/64.;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return vec4(p,glow);
|
||
|
|
}
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
vec2 v = -1.0 + (2.0 * gl_FragCoord.xy)/ iResolution.xy;
|
||
|
|
//vec2 v = 2.0 * gl_FragCoord.xy / iResolution.xy;
|
||
|
|
v.x *= iResolution.x/iResolution.y;
|
||
|
|
|
||
|
|
vec3 org = vec3(0., -2., 4.);
|
||
|
|
vec3 dir = normalize(vec3(v.x*1.6, -v.y, -1.5));
|
||
|
|
|
||
|
|
vec4 p = raymarch(org, dir);
|
||
|
|
float glow = p.w;
|
||
|
|
|
||
|
|
vec4 col = mix(vec4(1.,.5,.1,1.), vec4(0.1,.5,1.,1.), p.y*.02+.4);
|
||
|
|
|
||
|
|
gl_FragColor = mix(vec4(0.), col, pow(glow*2.,4.));
|
||
|
|
//gl_FragColor = col;
|
||
|
|
//gl_FragColor = mix(vec4(1.), mix(vec4(1.,.5,.1,1.),vec4(0.1,.5,1.,1.),p.y*.02+.4), pow(glow*2.,4.));
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
);
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
static const char* starNestFrg = STRINGIFY(
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
uniform vec2 center;
|
||
|
|
uniform vec2 resolution;
|
||
|
|
|
||
|
|
vec2 iCenter = center;
|
||
|
|
vec2 iResolution = resolution; // viewport resolution (in pixels)
|
||
|
|
float iGlobalTime = CC_Time[1]; // shader playback time (in seconds)
|
||
|
|
//uniform float iChannelTime[4]; // channel playback time (in seconds)
|
||
|
|
//uniform vec3 iChannelResolution[4]; // channel resolution (in pixels)
|
||
|
|
vec4 iMouse = vec4(0,0,0,0); // mouse pixel coords. xy: current (if MLB down), zw: click
|
||
|
|
//uniform sampler2D iChannel0; // input channel. XX = 2D/Cube
|
||
|
|
|
||
|
|
// Star Nest by Pablo Román Andrioli
|
||
|
|
|
||
|
|
// This content is under the MIT License.
|
||
|
|
|
||
|
|
int iterations = 17;
|
||
|
|
float formuparam = 0.53;
|
||
|
|
|
||
|
|
int volsteps = 20;
|
||
|
|
float stepsize = 0.1;
|
||
|
|
|
||
|
|
float zoom = 0.800;
|
||
|
|
float tile = 0.850;
|
||
|
|
float speed = 0.010;
|
||
|
|
|
||
|
|
float brightness = 0.0015;
|
||
|
|
float darkmatter = 0.300;
|
||
|
|
float distfading = 0.730;
|
||
|
|
float saturation = 0.850;
|
||
|
|
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
// iCenter = vec2(300, 300);
|
||
|
|
//get coords and direction
|
||
|
|
vec2 uv=gl_FragCoord.xy/iResolution.xy -.5;
|
||
|
|
//vec2 uv=gl_FragCoord.xy/iResolution.xy ;
|
||
|
|
//vec2 uv = ( 2* gl_FragCoord.xy - iCenter.xy) / resolution.xy;
|
||
|
|
uv.y*=iResolution.y/iResolution.x;
|
||
|
|
|
||
|
|
//vec2 uv = 2.0* (gl_FragCoord.xy-iResolution.xy)/min(iResolution.y,iResolution.x);
|
||
|
|
|
||
|
|
vec3 dir=vec3(uv*zoom,1.);
|
||
|
|
float time=iGlobalTime*speed+.25;
|
||
|
|
|
||
|
|
//mouse rotation
|
||
|
|
float a1=.5+iMouse.x/iResolution.x*2.;
|
||
|
|
float a2=.8+iMouse.y/iResolution.y*2.;
|
||
|
|
mat2 rot1=mat2(cos(a1),sin(a1),-sin(a1),cos(a1));
|
||
|
|
mat2 rot2=mat2(cos(a2),sin(a2),-sin(a2),cos(a2));
|
||
|
|
dir.xz*=rot1;
|
||
|
|
dir.xy*=rot2;
|
||
|
|
vec3 from=vec3(1.,.5,0.5);
|
||
|
|
from+=vec3(time*2.,time,-2.);
|
||
|
|
from.xz*=rot1;
|
||
|
|
from.xy*=rot2;
|
||
|
|
|
||
|
|
//volumetric rendering
|
||
|
|
float s=0.1;
|
||
|
|
float fade=1.;
|
||
|
|
vec3 v=vec3(0.);
|
||
|
|
for (int r=0; r<volsteps; r++) {
|
||
|
|
vec3 p=from+s*dir*.5;
|
||
|
|
p = abs(vec3(tile)-mod(p,vec3(tile*2.))); // tiling fold
|
||
|
|
|
||
|
|
float a= 0.;
|
||
|
|
float pa=0.;
|
||
|
|
for (int i=0; i<iterations; i++) {
|
||
|
|
p=abs(p)/dot(p,p)-formuparam; // the magic formula
|
||
|
|
a+=abs(length(p)-pa); // absolute sum of average change
|
||
|
|
pa=length(p);
|
||
|
|
}
|
||
|
|
float dm=max(0.,darkmatter-a*a*.001); //dark matter
|
||
|
|
a*=a*a; // add contrast
|
||
|
|
if (r>6) fade*=1.-dm; // dark matter, don't render near
|
||
|
|
//v+=vec3(dm,dm*.5,0.);
|
||
|
|
v+=fade;
|
||
|
|
v+=vec3(s,s*s,s*s*s*s)*a*brightness*fade; // coloring based on distance
|
||
|
|
fade*=distfading; // distance fading
|
||
|
|
s+=stepsize;
|
||
|
|
}
|
||
|
|
v=mix(vec3(length(v)),v,saturation); //color adjust
|
||
|
|
gl_FragColor = vec4(v*.01,1.);
|
||
|
|
|
||
|
|
}
|
||
|
|
);
|
||
|
|
|
||
|
|
|
||
|
|
static const char* shadertoyRelentlessFrag = STRINGIFY(
|
||
|
|
|
||
|
|
|
||
|
|
uniform vec2 center;
|
||
|
|
uniform vec2 resolution;
|
||
|
|
|
||
|
|
vec2 iCenter = center;
|
||
|
|
vec2 iResolution = resolution; // viewport resolution (in pixels)
|
||
|
|
float iGlobalTime = CC_Time[1]; // shader playback time (in seconds)
|
||
|
|
//uniform float iChannelTime[4]; // channel playback time (in seconds)
|
||
|
|
//uniform vec3 iChannelResolution[4]; // channel resolution (in pixels)
|
||
|
|
|
||
|
|
vec4 iMouse = vec4(0,0,0,0); // mouse pixel coords. xy: current (if MLB down), zw: click
|
||
|
|
//uniform sampler2D iChannel0; // input channel. XX = 2D/Cube
|
||
|
|
|
||
|
|
// srtuss, 2013
|
||
|
|
// collecting some design ideas for a new game project.
|
||
|
|
// no raymarching is used.
|
||
|
|
|
||
|
|
// if i could add a custom soundtrack, it'd use this one (essential for desired sensation)
|
||
|
|
// http://www.youtube.com/watch?v=1uFAu65tZpo
|
||
|
|
|
||
|
|
|
||
|
|
//#define GREEN_VERSION
|
||
|
|
|
||
|
|
// ** improved camera shaking
|
||
|
|
// ** cleaned up code
|
||
|
|
// ** added stuff to the gates
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
float time = iGlobalTime;
|
||
|
|
|
||
|
|
vec2 rotate(vec2 p, float a)
|
||
|
|
{
|
||
|
|
return vec2(p.x * cos(a) - p.y * sin(a), p.x * sin(a) + p.y * cos(a));
|
||
|
|
}
|
||
|
|
float box(vec2 p, vec2 b, float r)
|
||
|
|
{
|
||
|
|
return length(max(abs(p) - b, 0.0)) - r;
|
||
|
|
}
|
||
|
|
|
||
|
|
// iq's ray-plane-intersection code
|
||
|
|
vec3 intersect(in vec3 o, in vec3 d, vec3 c, vec3 u, vec3 v)
|
||
|
|
{
|
||
|
|
vec3 q = o - c;
|
||
|
|
return vec3(
|
||
|
|
dot(cross(u, v), q),
|
||
|
|
dot(cross(q, u), d),
|
||
|
|
dot(cross(v, q), d)) / dot(cross(v, u), d);
|
||
|
|
}
|
||
|
|
|
||
|
|
// some noise functions for fast developing
|
||
|
|
float rand11(float p)
|
||
|
|
{
|
||
|
|
return fract(sin(p * 591.32) * 43758.5357);
|
||
|
|
}
|
||
|
|
|
||
|
|
float rand12(vec2 p)
|
||
|
|
{
|
||
|
|
return fract(sin(dot(p.xy, vec2(12.9898, 78.233))) * 43758.5357);
|
||
|
|
}
|
||
|
|
|
||
|
|
vec2 rand21(float p)
|
||
|
|
{
|
||
|
|
return fract(vec2(sin(p * 591.32), cos(p * 391.32)));
|
||
|
|
}
|
||
|
|
|
||
|
|
vec2 rand22(in vec2 p)
|
||
|
|
{
|
||
|
|
return fract(vec2(sin(p.x * 591.32 + p.y * 154.077), cos(p.x * 391.32 + p.y * 49.077)));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
float noise11(float p)
|
||
|
|
{
|
||
|
|
float fl = floor(p);
|
||
|
|
return mix(rand11(fl), rand11(fl + 1.0), fract(p));//smoothstep(0.0, 1.0, fract(p)));
|
||
|
|
}
|
||
|
|
|
||
|
|
float fbm11(float p)
|
||
|
|
{
|
||
|
|
return noise11(p) * 0.5 + noise11(p * 2.0) * 0.25 + noise11(p * 5.0) * 0.125;
|
||
|
|
}
|
||
|
|
|
||
|
|
vec3 noise31(float p)
|
||
|
|
{
|
||
|
|
return vec3(noise11(p), noise11(p + 18.952), noise11(p - 11.372)) * 2.0 - 1.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// something that looks a bit like godrays coming from the surface
|
||
|
|
float sky(vec3 p)
|
||
|
|
{
|
||
|
|
float a = atan(p.x, p.z);
|
||
|
|
float t = time * 0.1;
|
||
|
|
float v = rand11(floor(a * 4.0 + t)) * 0.5 + rand11(floor(a * 8.0 - t)) * 0.25 + rand11(floor(a * 16.0 + t)) * 0.125;
|
||
|
|
return v;
|
||
|
|
}
|
||
|
|
|
||
|
|
vec3 voronoi(in vec2 x)
|
||
|
|
{
|
||
|
|
vec2 n = floor(x); // grid cell id
|
||
|
|
vec2 f = fract(x); // grid internal position
|
||
|
|
vec2 mg; // shortest distance...
|
||
|
|
vec2 mr; // ..and second shortest distance
|
||
|
|
float md = 8.0;
|
||
|
|
float md2 = 8.0;
|
||
|
|
for(int j = -1; j <= 1; j ++)
|
||
|
|
{
|
||
|
|
for(int i = -1; i <= 1; i ++)
|
||
|
|
{
|
||
|
|
vec2 g = vec2(float(i), float(j)); // cell id
|
||
|
|
vec2 o = rand22(n + g); // offset to edge point
|
||
|
|
vec2 r = g + o - f;
|
||
|
|
|
||
|
|
float d = max(abs(r.x), abs(r.y)); // distance to the edge
|
||
|
|
|
||
|
|
if(d < md)
|
||
|
|
{md2 = md; md = d; mr = r; mg = g;}
|
||
|
|
else if(d < md2)
|
||
|
|
{md2 = d;}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return vec3(n + mg, md2 - md);
|
||
|
|
}
|
||
|
|
|
||
|
|
//#define A2V(a) vec2(sin((a) * 6.28318531 / 100.0), cos((a) * 6.28318531 / 100.0))
|
||
|
|
vec2 A2V(float a)
|
||
|
|
{
|
||
|
|
return vec2(sin((a) * 6.28318531 / 100.0), cos((a) * 6.28318531 / 100.0));
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
float circles(vec2 p)
|
||
|
|
{
|
||
|
|
float v;
|
||
|
|
float w;
|
||
|
|
float l;
|
||
|
|
float c;
|
||
|
|
vec2 pp;
|
||
|
|
l = length(p);
|
||
|
|
|
||
|
|
|
||
|
|
pp = rotate(p, time * 3.0);
|
||
|
|
c = max(dot(pp, normalize(vec2(-0.2, 0.5))), -dot(pp, normalize(vec2(0.2, 0.5))));
|
||
|
|
c = min(c, max(dot(pp, normalize(vec2(0.5, -0.5))), -dot(pp, normalize(vec2(0.2, -0.5)))));
|
||
|
|
c = min(c, max(dot(pp, normalize(vec2(0.3, 0.5))), -dot(pp, normalize(vec2(0.2, 0.5)))));
|
||
|
|
|
||
|
|
// innerest stuff
|
||
|
|
v = abs(l - 0.5) - 0.03;
|
||
|
|
v = max(v, -c);
|
||
|
|
v = min(v, abs(l - 0.54) - 0.02);
|
||
|
|
v = min(v, abs(l - 0.64) - 0.05);
|
||
|
|
|
||
|
|
pp = rotate(p, time * -1.333);
|
||
|
|
c = max(dot(pp, A2V(-5.0)), -dot(pp, A2V(5.0)));
|
||
|
|
c = min(c, max(dot(pp, A2V(25.0 - 5.0)), -dot(pp, A2V(25.0 + 5.0))));
|
||
|
|
c = min(c, max(dot(pp, A2V(50.0 - 5.0)), -dot(pp, A2V(50.0 + 5.0))));
|
||
|
|
c = min(c, max(dot(pp, A2V(75.0 - 5.0)), -dot(pp, A2V(75.0 + 5.0))));
|
||
|
|
|
||
|
|
w = abs(l - 0.83) - 0.09;
|
||
|
|
v = min(v, max(w, c));
|
||
|
|
|
||
|
|
return v;
|
||
|
|
}
|
||
|
|
|
||
|
|
float shade1(float d)
|
||
|
|
{
|
||
|
|
float v = 1.0 - smoothstep(0.0, mix(0.012, 0.2, 0.0), d);
|
||
|
|
float g = exp(d * -20.0);
|
||
|
|
return v + g * 0.5;
|
||
|
|
}
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
vec2 uv = gl_FragCoord.xy / iResolution.xy;
|
||
|
|
uv = uv * 2.0 - 1.0;
|
||
|
|
uv.x *= iResolution.x / iResolution.y;
|
||
|
|
|
||
|
|
|
||
|
|
// using an iq styled camera this time :)
|
||
|
|
// ray origin
|
||
|
|
vec3 ro = 0.7 * vec3(cos(0.2 * time), 0.0, sin(0.2 * time));
|
||
|
|
ro.y = cos(0.6 * time) * 0.3 + 0.65;
|
||
|
|
// camera look at
|
||
|
|
vec3 ta = vec3(0.0, 0.2, 0.0);
|
||
|
|
|
||
|
|
// camera shake intensity
|
||
|
|
float shake = clamp(3.0 * (1.0 - length(ro.yz)), 0.3, 1.0);
|
||
|
|
float st = mod(time, 10.0) * 143.0;
|
||
|
|
|
||
|
|
// build camera matrix
|
||
|
|
vec3 ww = normalize(ta - ro + noise31(st) * shake * 0.01);
|
||
|
|
vec3 uu = normalize(cross(ww, normalize(vec3(0.0, 1.0, 0.2 * sin(time)))));
|
||
|
|
vec3 vv = normalize(cross(uu, ww));
|
||
|
|
// obtain ray direction
|
||
|
|
vec3 rd = normalize(uv.x * uu + uv.y * vv + 1.0 * ww);
|
||
|
|
|
||
|
|
// shaking and movement
|
||
|
|
ro += noise31(-st) * shake * 0.015;
|
||
|
|
ro.x += time * 2.0;
|
||
|
|
|
||
|
|
float inten = 0.0;
|
||
|
|
|
||
|
|
// background
|
||
|
|
float sd = dot(rd, vec3(0.0, 1.0, 0.0));
|
||
|
|
inten = pow(1.0 - abs(sd), 20.0) + pow(sky(rd), 5.0) * step(0.0, rd.y) * 0.2;
|
||
|
|
|
||
|
|
vec3 its;
|
||
|
|
float v;
|
||
|
|
float g;
|
||
|
|
|
||
|
|
// voronoi floor layers
|
||
|
|
for(int i = 0; i < 4; i ++)
|
||
|
|
{
|
||
|
|
float layer = float(i);
|
||
|
|
its = intersect(ro, rd, vec3(0.0, -5.0 - layer * 5.0, 0.0), vec3(1.0, 0.0, 0.0), vec3(0.0, 0.0, 1.0));
|
||
|
|
if(its.x > 0.0)
|
||
|
|
{
|
||
|
|
vec3 vo = voronoi((its.yz) * 0.05 + 8.0 * rand21(float(i)));
|
||
|
|
v = exp(-100.0 * (vo.z - 0.02));
|
||
|
|
|
||
|
|
float fx = 0.0;
|
||
|
|
|
||
|
|
// add some special fx to lowest layer
|
||
|
|
if(i == 3)
|
||
|
|
{
|
||
|
|
float crd = 0.0;//fract(time * 0.2) * 50.0 - 25.0;
|
||
|
|
float fxi = cos(vo.x * 0.2 + time * 1.5);//abs(crd - vo.x);
|
||
|
|
fx = clamp(smoothstep(0.9, 1.0, fxi), 0.0, 0.9) * 1.0 * rand12(vo.xy);
|
||
|
|
fx *= exp(-3.0 * vo.z) * 2.0;
|
||
|
|
}
|
||
|
|
inten += v * 0.1 + fx;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// draw the gates, 4 should be enough
|
||
|
|
float gatex = floor(ro.x / 8.0 + 0.5) * 8.0 + 4.0;
|
||
|
|
float go = -16.0;
|
||
|
|
for(int i = 0; i < 4; i ++)
|
||
|
|
{
|
||
|
|
its = intersect(ro, rd, vec3(gatex + go, 0.0, 0.0), vec3(0.0, 1.0, 0.0), vec3(0.0, 0.0, 1.0));
|
||
|
|
if(dot(its.yz, its.yz) < 2.0 && its.x > 0.0)
|
||
|
|
{
|
||
|
|
v = circles(its.yz);
|
||
|
|
inten += shade1(v);
|
||
|
|
}
|
||
|
|
|
||
|
|
go += 8.0;
|
||
|
|
}
|
||
|
|
|
||
|
|
// draw the stream
|
||
|
|
for(int j = 0; j < 20; j ++)
|
||
|
|
{
|
||
|
|
float id = float(j);
|
||
|
|
|
||
|
|
vec3 bp = vec3(0.0, (rand11(id) * 2.0 - 1.0) * 0.25, 0.0);
|
||
|
|
vec3 its = intersect(ro, rd, bp, vec3(1.0, 0.0, 0.0), vec3(0.0, 0.0, 1.0));
|
||
|
|
|
||
|
|
if(its.x > 0.0)
|
||
|
|
{
|
||
|
|
vec2 pp = its.yz;
|
||
|
|
float spd = (1.0 + rand11(id) * 3.0) * 2.5;
|
||
|
|
pp.y += time * spd;
|
||
|
|
pp += (rand21(id) * 2.0 - 1.0) * vec2(0.3, 1.0);
|
||
|
|
float rep = rand11(id) + 1.5;
|
||
|
|
pp.y = mod(pp.y, rep * 2.0) - rep;
|
||
|
|
float d = box(pp, vec2(0.02, 0.3), 0.1);
|
||
|
|
float foc = 0.0;
|
||
|
|
float v = 1.0 - smoothstep(0.0, 0.03, abs(d) - 0.001);
|
||
|
|
float g = min(exp(d * -20.0), 2.0);
|
||
|
|
|
||
|
|
inten += (v + g * 0.7) * 0.5;
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
inten *= 0.4 + (sin(time) * 0.5 + 0.5) * 0.6;
|
||
|
|
|
||
|
|
// find a color for the computed intensity
|
||
|
|
#ifdef GREEN_VERSION
|
||
|
|
vec3 col = pow(vec3(inten), vec3(2.0, 0.15, 9.0));
|
||
|
|
#else
|
||
|
|
vec3 col = pow(vec3(inten), 1.5 * vec3(0.15, 2.0, 9.0));
|
||
|
|
#endif
|
||
|
|
|
||
|
|
gl_FragColor = vec4(col, 1.0);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
);
|