drawing lines with triangles

1 files changed, 12 insertions, 0 deletions

diff --git a/src/shader/linejoin.vertex.glsl b/src/shader/linejoin.vertex.glsl
new file mode 100644
index 0000000000..8e67af2539
--- /dev/null
+++ b/src/shader/linejoin.vertex.glsl
@@ -0,0 +1,12 @@
+attribute vec2 a_pos;
+
+uniform mat4 u_matrix;
+uniform vec2 u_world;
+
+varying vec2 v_pos;
+
+void main() {
+    gl_Position = u_matrix * vec4(floor(a_pos / 2.0), 0.0, 1.0);
+    v_pos = (gl_Position.xy + 1.0) * u_world;
+    gl_PointSize = u_linewidth.s * 2.0;
+}