cca3adb375
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
28 lines
673 B
GLSL
28 lines
673 B
GLSL
in vec2 v_extrude;
|
|
|
|
layout (std140) uniform HeatmapEvaluatedPropsUBO {
|
|
highp float u_weight;
|
|
highp float u_radius;
|
|
highp float u_intensity;
|
|
lowp float props_pad1;
|
|
};
|
|
|
|
#pragma mapbox: define highp float weight
|
|
|
|
// Gaussian kernel coefficient: 1 / sqrt(2 * PI)
|
|
#define GAUSS_COEF 0.3989422804014327
|
|
|
|
void main() {
|
|
#pragma mapbox: initialize highp float weight
|
|
|
|
// Kernel density estimation with a Gaussian kernel of size 5x5
|
|
float d = -0.5 * 3.0 * 3.0 * dot(v_extrude, v_extrude);
|
|
float val = weight * u_intensity * GAUSS_COEF * exp(d);
|
|
|
|
fragColor = vec4(val, 1.0, 1.0, 1.0);
|
|
|
|
#ifdef OVERDRAW_INSPECTOR
|
|
fragColor = vec4(1.0);
|
|
#endif
|
|
}
|