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Added flickering to the geometry shader.

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Faerbit 2015-03-08 01:53:00 +01:00
parent bd584c3ce4
commit b68015a6c4
1 changed files with 38 additions and 15 deletions
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53
data/shader/flame.gsh
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@ -12,37 +12,60 @@ in vec3 Color[];
out vec3 fColor; out vec3 fColor;
const float PI = 3.1415926; const float PI = 3.1415926;
const float transition_point = 1.178097; const float transition_point_1 = 1.178097;
const float sin_p1 = 0.4; const float sin_p1_1 = 0.4;
const float sin_p2 = 2; const float sin_p2_1 = 2;
const float ex_p1 = 1.093; const float ex_p1_1 = 1.093;
const float ex_p2 = 1.9996; const float ex_p2_1 = 1.9996;
const float begin = 0; const float begin_1 = 0;
const float end = 2.5; const float end_1 = 2.5;
const float transition_point_2 = 1.570796;
const float sin_p1_2 = 0.2;
const float sin_p2_2 = 1.5;
const float ex_p1_2 = 0.4;
const float ex_p2_2 = 1.5;
const float begin_2 = 0;
const float end_2 = 3;
float flickerFunction() {
return sin(time);
}
float radiusFunction(float x) { float radiusFunction(float x) {
if (x < transition_point) { float value_1 = 0.0;
return sin_p1 * sin(sin_p2 * x); float value_2 = 0.0;
if (x < transition_point_1) {
value_1 = sin_p1_1 * sin(sin_p2_1 * x);
} }
else { else {
return exp(ex_p1 - ex_p2 * x); value_1 = exp(ex_p1_1 - ex_p2_1 * x);
} }
if (x < transition_point_2) {
value_2 = sin_p1_2 * sin(sin_p2_2 * x);
}
else {
value_2 = exp(ex_p1_2 - ex_p2_2 * x);
}
return mix(value_1, value_2, flickerFunction());
} }
void main() { void main() {
fColor = Color[0]; fColor = Color[0];
float resolution = 8.0; float resolution = 8.0;
float step = abs(end-begin)/resolution/2.0; float this_begin = mix(begin_1, begin_2, flickerFunction());
float this_end = mix(end_1, end_2, flickerFunction());
float step = abs(this_end-this_begin)/resolution/2.0;
float i = 0.0; float i = 0.0;
float render_end = 0.0; float render_end = 0.0;
if (bottom) { if (bottom) {
i = begin; i = this_begin;
render_end = (end-begin)/2.0+step; render_end = (this_end-this_begin)/2.0+step;
} }
else { else {
i = (end-begin)/2.0; i = (this_end-this_begin)/2.0;
render_end = end; render_end = this_end;
} }
for (i; i<render_end; i+=step) { for (i; i<render_end; i+=step) {
float downRadius = radiusFunction(i); float downRadius = radiusFunction(i);