andras/decla-red
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Add input handling

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This commit is contained in:
schmelczerandras 2020-07-18 22:02:09 +02:00
parent 29c6b14440
commit d5be727040
36 changed files with 417 additions and 113 deletions
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19
frontend/src/shaders/dist.frag
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@ -41,6 +41,24 @@ float terrain(float x) {
return result;
}
vec2 random2(vec2 st){
st = vec2( dot(st,vec2(127.1,311.7)),
dot(st,vec2(269.5,183.3)) );
return -1.0 + 2.0*fract(sin(st)*43758.5453123);
}
float noise(vec2 st) {
vec2 i = floor(st);
vec2 f = fract(st);
vec2 u = f*f*(3.0-2.0*f);
return mix( mix( dot( random2(i + vec2(0.0,0.0) ), f - vec2(0.0,0.0) ),
dot( random2(i + vec2(1.0,0.0) ), f - vec2(1.0,0.0) ), u.x),
mix( dot( random2(i + vec2(0.0,1.0) ), f - vec2(0.0,1.0) ),
dot( random2(i + vec2(1.0,1.0) ), f - vec2(1.0,1.0) ), u.x), u.y);
}
float lineDistance(in vec2 position, in Line line, out float h) {
vec2 pa = position - line.a, ba = line.b - line.a;
h = clamp(dot(pa, ba) / dot(ba, ba), 0.0, 1.0);
@ -50,6 +68,7 @@ float lineDistance(in vec2 position, in Line line, out float h) {
return length(delta) * side + terrain(length(ba * h));
}
Line endDummyLineFromLine(Line line) {
return Line(line.b, line.b + rotate90deg(line.normal), line.normal, false);
}