assets.shaders.texture_layer.glsl Maven / Gradle / Ivy

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OpenGL vector map library written in Java - running on Android, iOS, Desktop and within the browser.

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#ifdef GLES
precision highp float;
#endif
attribute vec4 a_pos;
attribute vec2 a_tex_coord;
uniform mat4 u_mv;
uniform mat4 u_proj;
uniform float u_scale;
uniform float u_coord_scale;
uniform vec2 u_div;
varying vec2 tex_c;

void main() {
    vec4 pos;
    vec2 dir = a_pos.zw;
    float coord_scale = 1.0 / u_coord_scale;
    if (abs(mod(a_pos.x, 2.0)) == 0.0) {
        pos = u_proj * (u_mv * vec4(a_pos.xy + dir * u_scale, 0.0, 1.0));
    } else { // place as billboard
        vec4 center = u_mv * vec4(a_pos.xy, 0.0, 1.0);
        pos = u_proj * (center + vec4(dir * coord_scale, 0.0, 0.0));
    }
    gl_Position = pos;
    tex_c = a_tex_coord * u_div;
}

$$

#ifdef GLES
precision highp float;
#endif
uniform sampler2D u_tex;
varying vec2 tex_c;

void main() {
    gl_FragColor = texture2D(u_tex, tex_c.xy);
}