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update frag shader + comment #2

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update frag shader + comment #2

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fddd2a5
update frag shader + comment
TheoBessel Apr 15, 2021
697b924
cool fragment shader
TheoBessel Apr 16, 2021
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1 change: 1 addition & 0 deletions render/mainWindow/compile.sh
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Original file line number Diff line number Diff line change
@@ -0,0 +1 @@
cd ../../render/mainWindow && cd fragment && glslangValidator -V baseShader.frag && cd ../vertex && glslangValidator -V baseShader.vert
80 changes: 79 additions & 1 deletion render/mainWindow/fragment/baseShader.frag
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Expand Up @@ -2,9 +2,87 @@
#extension GL_ARB_separate_shader_objects : enable

layout(location = 0) in vec3 fragColor;

layout(location = 0) out vec4 outColor;

void drawCircle(vec2 center, float radius, bool gradient, bool invert) {
float centerDistance = distance(gl_FragCoord.xy, center.xy);
vec3 grad = vec3(centerDistance/radius,centerDistance/radius,centerDistance/radius);
if (centerDistance <= radius) {
if (invert) {
outColor = vec4(1.0-fragColor.x, 0.0, 1.0-fragColor.z, 1.0);
} else {
float color = 1.0;
if (gradient) {
color = 1.-centerDistance/radius;
} outColor = vec4(color, color, color, 1.0);
}
} else {
outColor = vec4(fragColor, 1.0);
}
}

void drawQuatrefoil(vec2 center, bool gradient, bool invert) {
float x = gl_FragCoord.x-800;
float y = gl_FragCoord.y-800;
float centerDistance = pow(pow(x,2)+pow(y,2),3);
float radius = 3200000*pow(x*y,2);
if (centerDistance <= radius) {
if (invert) {
outColor = vec4(1.0-fragColor.x, 0.0, 1.0-fragColor.z, 1.0);
} else {
float color = 1.0;
if (gradient) {
color = 1.-centerDistance/radius;
} outColor = vec4(color, color, color, 1.0);
}
} else {
outColor = vec4(fragColor, 1.0);
}
}

void drawCardioid(vec2 center, float a, bool gradient, bool invert) {
float x = gl_FragCoord.x-800;
float y = gl_FragCoord.y-800;
float centerDistance = pow(pow(x,2)+pow(y,2)-a*x,2);
float radius = pow(a,2)*(pow(x,2)+pow(y,2));

if (pow(pow(x,2)+pow(y,2)-a*x,2)<=pow(a,2)*(pow(x,2)+pow(y,2))) {
if (invert) {
outColor = vec4(1.0-fragColor.x, 0.0, 1.0-fragColor.z, 1.0);
} else {
float color = 1.0;
if (gradient) {
color = 1.-centerDistance/radius;
} outColor = vec4(color, color, color, 1.0);
}
} else {
outColor = vec4(fragColor, 1.0);
}
}

void drawLemniscate(vec2 center, float d, bool gradient, bool invert) {
float x = gl_FragCoord.x-800;
float y = gl_FragCoord.y-800;
float centerDistance = pow(pow(x,2)+pow(y,2),2);
float radius = 2*pow(d,2)*(pow(x,2)-pow(y,2));
if (pow(pow(x,2)+pow(y,2),2)<=2*pow(d,2)*(pow(x,2)-pow(y,2))) {
if (invert) {
outColor = vec4(1.0-fragColor.x, 0.0, 1.0-fragColor.z, 1.0);
} else {
float color = 1.0;
if (gradient) {
color = 1.-centerDistance/radius;
} outColor = vec4(color, color, color, 1.0);
}
} else {
outColor = vec4(fragColor, 1.0);
}
}

void main() {
//drawCircle(vec2(800,800),400,true,false);
//drawCardioid(vec2(800,800),400,true,false);
//drawLemniscate(vec2(800,800),400,true,false);
//drawQuatrefoil(vec2(800,800),true,false);
outColor = vec4(fragColor, 1.0);
}
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