xiaoyan159/vtm
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Circles (GL points) stroke #268

Browse Source
This commit is contained in:
Emux
2016-12-14 11:34:34 +02:00
parent 7acbea88cc
commit 61b8233b97
4 changed files with 26 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
vtm/resources/assets/shaders/circle_point.glsl
View File

@@ -2,11 +2,11 @@
precision highp float;
#endif
uniform mat4 u_mvp;
uniform float u_scale;
uniform float u_radius;
attribute vec2 a_pos;
void main() {
gl_Position = u_mvp * vec4(a_pos, 0.0, 1.0);
gl_PointSize = 2.0 * u_scale / gl_Position.z;
gl_PointSize = 2.0 * u_radius / gl_Position.z;
}
$$
@@ -17,11 +17,16 @@ $$
#ifdef GLES
precision highp float;
#endif
uniform vec4 u_color;
uniform vec4 u_fill;
uniform float u_radius;
uniform vec4 u_stroke;
uniform float u_width;
void main() {
vec2 cxy = 2.0 * gl_PointCoord - 1.0;
float r = dot(cxy, cxy);
float delta = fwidth(r);
float alpha = 1.0 - smoothstep(1.0 - delta, 1.0 + delta, r);
gl_FragColor = u_color * alpha;
float edge = 1.0 - u_width / u_radius;
float stroke = 1.0 - smoothstep(edge - delta, edge + delta, r);
gl_FragColor = mix(u_stroke, u_fill, stroke) * alpha;
}

8
vtm/resources/assets/shaders/circle_quad.glsl
View File

@@ -14,9 +14,11 @@ $$
#ifdef GLES
precision highp float;
#endif
uniform vec4 u_color;
uniform float u_scale;
uniform vec4 u_fill;
uniform float u_radius;
uniform vec4 u_stroke;
uniform float u_width;
varying vec2 v_pos;
void main() {
gl_FragColor = u_color;
gl_FragColor = u_fill;
}