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File size: 2,892 Bytes
9a14526 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | uniform mat4 u_matrix;
uniform vec2 u_pixel_coord_upper;
uniform vec2 u_pixel_coord_lower;
uniform float u_height_factor;
uniform vec3 u_scale;
uniform float u_vertical_gradient;
uniform lowp float u_opacity;
uniform vec3 u_lightcolor;
uniform lowp vec3 u_lightpos;
uniform lowp float u_lightintensity;
attribute vec2 a_pos;
attribute vec4 a_normal_ed;
varying vec2 v_pos_a;
varying vec2 v_pos_b;
varying vec4 v_lighting;
#pragma mapbox: define lowp float base
#pragma mapbox: define lowp float height
#pragma mapbox: define lowp vec4 pattern_from
#pragma mapbox: define lowp vec4 pattern_to
#pragma mapbox: define lowp float pixel_ratio_from
#pragma mapbox: define lowp float pixel_ratio_to
void main() {
#pragma mapbox: initialize lowp float base
#pragma mapbox: initialize lowp float height
#pragma mapbox: initialize mediump vec4 pattern_from
#pragma mapbox: initialize mediump vec4 pattern_to
#pragma mapbox: initialize lowp float pixel_ratio_from
#pragma mapbox: initialize lowp float pixel_ratio_to
vec2 pattern_tl_a = pattern_from.xy;
vec2 pattern_br_a = pattern_from.zw;
vec2 pattern_tl_b = pattern_to.xy;
vec2 pattern_br_b = pattern_to.zw;
float tileRatio = u_scale.x;
float fromScale = u_scale.y;
float toScale = u_scale.z;
vec3 normal = a_normal_ed.xyz;
float edgedistance = a_normal_ed.w;
vec2 display_size_a = (pattern_br_a - pattern_tl_a) / pixel_ratio_from;
vec2 display_size_b = (pattern_br_b - pattern_tl_b) / pixel_ratio_to;
base = max(0.0, base);
height = max(0.0, height);
float t = mod(normal.x, 2.0);
float z = t > 0.0 ? height : base;
gl_Position = u_matrix * vec4(a_pos, z, 1);
vec2 pos = normal.x == 1.0 && normal.y == 0.0 && normal.z == 16384.0
? a_pos // extrusion top
: vec2(edgedistance, z * u_height_factor); // extrusion side
v_pos_a = get_pattern_pos(u_pixel_coord_upper, u_pixel_coord_lower, fromScale * display_size_a, tileRatio, pos);
v_pos_b = get_pattern_pos(u_pixel_coord_upper, u_pixel_coord_lower, toScale * display_size_b, tileRatio, pos);
v_lighting = vec4(0.0, 0.0, 0.0, 1.0);
float directional = clamp(dot(normal / 16383.0, u_lightpos), 0.0, 1.0);
directional = mix((1.0 - u_lightintensity), max((0.5 + u_lightintensity), 1.0), directional);
if (normal.y != 0.0) {
// This avoids another branching statement, but multiplies by a constant of 0.84 if no vertical gradient,
// and otherwise calculates the gradient based on base + height
directional *= (
(1.0 - u_vertical_gradient) +
(u_vertical_gradient * clamp((t + base) * pow(height / 150.0, 0.5), mix(0.7, 0.98, 1.0 - u_lightintensity), 1.0)));
}
v_lighting.rgb += clamp(directional * u_lightcolor, mix(vec3(0.0), vec3(0.3), 1.0 - u_lightcolor), vec3(1.0));
v_lighting *= u_opacity;
}
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