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Add colour cycles to the shader to show finer details. Works well with high iteration numbers

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This commit is contained in:
Josh Colclough 2023-10-25 21:26:53 +01:00
parent 067b52a159
commit 3eeaf9daf1
2 changed files with 7 additions and 4 deletions
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6
examples/shaders/resources/shaders/glsl100/julia_set.fs
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@ -13,7 +13,9 @@ uniform float zoom; // Zoom of the scale.
// NOTE: Maximum number of shader for-loop iterations depend on GPU,
// for example, on RasperryPi for this examply only supports up to 60
const int MAX_ITERATIONS = 48; // Max iterations to do
const int MAX_ITERATIONS = 48; // Max iterations to do.
const float COLOR_CYCLES = 1; // Number of times the palette repeats.
// Square a complex number
vec2 ComplexSquare(vec2 z)
@ -79,5 +81,5 @@ void main()
// If in set, color black. 0.999 allows for some float accuracy error.
if (norm > 0.999) gl_FragColor = vec4(0.0, 0.0, 0.0, 1.0);
else gl_FragColor = vec4(Hsv2rgb(vec3(norm, 1.0, 1.0)), 1.0);
else gl_FragColor = vec4(Hsv2rgb(vec3(norm * COLOR_CYCLES, 1.0, 1.0)), 1.0);
}

5
examples/shaders/resources/shaders/glsl330/julia_set.fs
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@ -12,7 +12,8 @@ uniform vec2 c; // c.x = real, c.y = imaginary component. Equati
uniform vec2 offset; // Offset of the scale.
uniform float zoom; // Zoom of the scale.
const int MAX_ITERATIONS = 255; // Max iterations to do.
const int MAX_ITERATIONS = 255; // Max iterations to do.
const float COLOR_CYCLES = 2; // Number of times the palette repeats. Can show higher detail for higher iteration numbers.
// Square a complex number
vec2 ComplexSquare(vec2 z)
@ -77,5 +78,5 @@ void main()
// If in set, color black. 0.999 allows for some float accuracy error.
if (norm > 0.999) finalColor = vec4(0.0, 0.0, 0.0, 1.0);
else finalColor = vec4(Hsv2rgb(vec3(norm, 1.0, 1.0)), 1.0);
else finalColor = vec4(Hsv2rgb(vec3(norm * COLOR_CYCLES, 1.0, 1.0)), 1.0);
}