37 lines
1.3 KiB
GLSL
37 lines
1.3 KiB
GLSL
uniform mat4 u_matrix;
|
|
uniform vec2 u_pixel_coord_upper;
|
|
uniform vec2 u_pixel_coord_lower;
|
|
uniform vec4 u_scale;
|
|
|
|
attribute vec2 a_pos;
|
|
|
|
varying vec2 v_pos_a;
|
|
varying vec2 v_pos_b;
|
|
|
|
#pragma mapbox: define lowp float opacity
|
|
#pragma mapbox: define lowp vec4 pattern_from
|
|
#pragma mapbox: define lowp vec4 pattern_to
|
|
|
|
void main() {
|
|
#pragma mapbox: initialize lowp float opacity
|
|
#pragma mapbox: initialize mediump vec4 pattern_from
|
|
#pragma mapbox: initialize mediump vec4 pattern_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 pixelRatio = u_scale.x;
|
|
float tileZoomRatio = u_scale.y;
|
|
float fromScale = u_scale.z;
|
|
float toScale = u_scale.w;
|
|
|
|
vec2 display_size_a = vec2((pattern_br_a.x - pattern_tl_a.x) / pixelRatio, (pattern_br_a.y - pattern_tl_a.y) / pixelRatio);
|
|
vec2 display_size_b = vec2((pattern_br_b.x - pattern_tl_b.x) / pixelRatio, (pattern_br_b.y - pattern_tl_b.y) / pixelRatio);
|
|
gl_Position = u_matrix * vec4(a_pos, 0, 1);
|
|
|
|
v_pos_a = get_pattern_pos(u_pixel_coord_upper, u_pixel_coord_lower, fromScale * display_size_a, tileZoomRatio, a_pos);
|
|
v_pos_b = get_pattern_pos(u_pixel_coord_upper, u_pixel_coord_lower, toScale * display_size_b, tileZoomRatio, a_pos);
|
|
}
|