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Beppe Vanrolleghem
2024-06-02 14:35:09 +02:00
parent efe6994597
commit 1dcc6145a4
4 changed files with 200 additions and 0 deletions
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52
learning/PixelSpirit/opposite.frag Normal file
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#ifdef GL_ES
precision mediump float;
#endif
uniform vec2 u_resolution;
uniform vec2 u_mouse;
uniform float u_time;
#define PI 3.14159265359
const vec3 uAColor = vec3(.5,.5,.5);
const vec3 uBColor = vec3(.5,.5,.5);
const vec3 uCColor = vec3(1.,1.,1.);
const vec3 uDColor = vec3(.0,.33,.67);
//get colors from http://dev.thi.ng/gradients/
vec3 cosPalette(float t) {
return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
}
float flip(float v, float pct) {
return mix(v, 1.-v, pct);
}
float rectSDF(vec2 st, vec2 s) {
st = st*2.-1.;
return max(abs(st.x/s.x),abs(st.y/s.y));
}
float fill(float x, float size) {
return 1.-step(size, x);
}
vec2 rotate(vec2 st, float a) {
st = mat2(cos(a),-sin(a),sin(a),cos(a))*(st-.5);
return st+.5;
}
void main() {
vec2 st = gl_FragCoord.xy/u_resolution;
vec3 color = vec3(0.0,0.0,0.0);
float alpha = 1.0;
st = rotate(st, radians(-45.));
vec2 off = vec2(.02);
vec2 size = vec2(1.);
float r1 = fill(rectSDF(st+off,size),.3);
float r2 = fill(rectSDF(st-off,size),.3);
color += flip(r1, r2);
gl_FragColor = vec4(color, alpha);
}

57
learning/PixelSpirit/the_mountain.frag Normal file
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#ifdef GL_ES
precision mediump float;
#endif
uniform vec2 u_resolution;
uniform vec2 u_mouse;
uniform float u_time;
#define PI 3.14159265359
const vec3 uAColor = vec3(.5,.5,.5);
const vec3 uBColor = vec3(.5,.5,.5);
const vec3 uCColor = vec3(1.,1.,1.);
const vec3 uDColor = vec3(.0,.33,.67);
//get colors from http://dev.thi.ng/gradients/
vec3 cosPalette(float t) {
return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
}
float rectSDF(vec2 st, vec2 s) {
st = st*2.-1.;
return max(abs(st.x/s.x),abs(st.y/s.y));
}
vec2 rotate(vec2 st, float a) {
st = mat2(cos(a),-sin(a),sin(a),cos(a))*(st-.5);
return st+.5;
}
float fill(float x, float size) {
return 1.-step(size, x);
}
void main() {
vec2 st = gl_FragCoord.xy/u_resolution;
vec3 color = vec3(0.0,0.0,0.0);
float alpha = 1.0;
// probably super inefficient/complicated
//st = rotate(st, radians(45.));
//float r1 = fill(rectSDF(st, vec2(1.,1.)),.3);
//float r1_bord = 1.-fill(rectSDF(st, vec2(1.,1.)),.35)-r1;
//float r2 = fill(rectSDF(st+vec2(-.12,.12),vec2(1.,1.)),.2);
//float r3 = fill(rectSDF(st+vec2(.12,-.12),vec2(1.,1.)),.2);
//color += r2+r3;
//color *= (r1_bord+r1);
//color += r1;
st = rotate(st, radians(-45.));
float off = .12;
vec2 s = vec2(1.);
color += fill(rectSDF(st+off,s),.2);
color += fill(rectSDF(st-off,s),.2);
float r = rectSDF(st,s);
color *= step(.33,r);
color += fill(r,.3);
// yep this step trick is way better then the fuckery i was doing
gl_FragColor = vec4(color, alpha);
}

47
learning/PixelSpirit/the_shadow.frag Normal file
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#ifdef GL_ES
precision mediump float;
#endif
uniform vec2 u_resolution;
uniform vec2 u_mouse;
uniform float u_time;
#define PI 3.14159265359
const vec3 uAColor = vec3(.5,.5,.5);
const vec3 uBColor = vec3(.5,.5,.5);
const vec3 uCColor = vec3(1.,1.,1.);
const vec3 uDColor = vec3(.0,.33,.67);
//get colors from http://dev.thi.ng/gradients/
vec3 cosPalette(float t) {
return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
}
vec2 rotate(vec2 st, float a) {
st = mat2(cos(a),-sin(a),sin(a),cos(a))*(st-.5);
return st+.5;
}
float rectSDF(vec2 st, vec2 s) {
st = st*2.-1.;
return max(abs(st.x/s.x),abs(st.y/s.y));
}
float fill(float x, float size) {
return 1.-step(size, x);
}
void main() {
vec2 st = gl_FragCoord.xy/u_resolution;
vec3 color = vec3(0.0,0.0,0.0);
float alpha = 1.0;
st = rotate(st, radians(-45.));
vec2 size = vec2(1.);
vec2 off = vec2(-0.02,.02);
color += fill(rectSDF(st+off, size),.3);
color += fill(rectSDF(st-off, size),.3);
color *= (1.-fill(rectSDF(st-off, size),.29));
//color *= step(.38,rectSDF(st-off,size));
gl_FragColor = vec4(color, alpha);
}

44
learning/PixelSpirit/the_stone.frag Normal file
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#ifdef GL_ES
precision mediump float;
#endif
uniform vec2 u_resolution;
uniform vec2 u_mouse;
uniform float u_time;
#define PI 3.14159265359
const vec3 uAColor = vec3(.5,.5,.5);
const vec3 uBColor = vec3(.5,.5,.5);
const vec3 uCColor = vec3(1.,1.,1.);
const vec3 uDColor = vec3(.0,.33,.67);
//get colors from http://dev.thi.ng/gradients/
vec3 cosPalette(float t) {
return uAColor + uBColor*cos(6.28318*(uCColor*t+uDColor));
}
vec2 rotate(vec2 st, float a) {
st = mat2(cos(a),-sin(a),sin(a),cos(a))*(st-.5);
return st+.5;
}
float rectSDF(vec2 st, vec2 s) {
st = st*2.-1.;
return max(abs(st.x/s.x),abs(st.y/s.y));
}
float fill(float x, float size) {
return 1.-step(size, x);
}
void main() {
vec2 st = gl_FragCoord.xy/u_resolution;
vec3 color = vec3(0.0,0.0,0.0);
float alpha = 1.0;
st = rotate(st, radians(45.));
for (int i = 0; i<4;i++) {
color += fill(rectSDF(st+vec2(.08,-.08),vec2(.3,.3)), .5);
st = rotate(st, radians(90.));
}
gl_FragColor = vec4(color, alpha);
}