a8251b1966
Conflicts: shader/laser_snippets src/CMakeLists.txt src/global.h src/projectile.c src/stage.c src/stage.h src/stages/stage3.c src/stages/stage3_events.c src/stages/stage4_events.c
75 lines
1.4 KiB
Text
75 lines
1.4 KiB
Text
%%VSHADER-HEAD%%
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#version 120
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#extension GL_EXT_draw_instanced : enable
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uniform vec2 a0;
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uniform vec2 a1;
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uniform vec2 a2;
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uniform vec2 a3;
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uniform vec2 pos;
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uniform float timeshift;
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uniform float wq;
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uniform float hq;
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uniform int span;
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float pi = 2.0 * asin(1.0);
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vec2 dir(float a) {
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return vec2(cos(a), sin(a));
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}
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float angle(vec2 v) {
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return atan(v.y, v.x);
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}
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vec2 posrule(float t) {
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%%VSHADER-FOOT%%
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}
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void main(void) {
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vec2 v = gl_Vertex.xy;
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float t1 = gl_InstanceID-span/2;
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float tail = span/1.9;
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float s = -0.75/pow(tail,2)*(t1-tail)*(t1+tail);
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vec2 pos = posrule(gl_InstanceID*0.5+timeshift);
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vec2 d = pos - posrule(gl_InstanceID*0.5+timeshift-0.1);
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float a = -angle(d);
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mat2 m = mat2(cos(a), -sin(a), sin(a), cos(a));
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v.x *= wq*1.5*length(d);
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v.y *= hq*s;
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gl_Position = gl_ModelViewProjectionMatrix*vec4(m*v+pos, 0.0, 1.0);
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gl_TexCoord[0] = gl_MultiTexCoord0;
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}
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%%FSHADER-HEAD%%
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#version 120
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uniform sampler2D tex;
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uniform vec4 clr;
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void main(void) {
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gl_FragColor = texture2D(tex, vec2(gl_TexCoord[0].xy))*clr;
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}
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%%linear%%
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return pos + a0*t;
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%%accelerated%%
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return pos + a0*t + 0.5*a1*t*t;
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%%maxwell%%
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vec2 p = vec2(t, a2.x*t*0.02*sin(0.1*t+a2.y));
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return pos + vec2(a0.x*p.x - a0.y*p.y, a0.x*p.y + a0.y*p.x);
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%%sine%%
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float s = (a2.x * t + a3.x);
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return pos + dir(angle(a0) + a1.x * sin(s) / s) * t * length(a0);
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%%sine_expanding%%
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float s = (a2.x * t + a3.x);
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return pos + dir(angle(a0) + a1.x * sin(s)) * t * length(a0);
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