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// ----------------------------------------------------------------------------
// Copyright (c) 2014, Nicolas P. Rougier. All Rights Reserved.
// Distributed under the (new) BSD License.
// ----------------------------------------------------------------------------
#include "antialias/antialias.glsl"
#include "antialias/caps.glsl"
// Varyings
// ------------------------------------
varying vec2 v_caps;
varying vec4 v_color;
varying float v_length;
varying vec2 v_texcoord;
varying float v_linewidth;
varying float v_antialias;
varying float v_miter_limit;
varying vec2 v_bevel_distance;
void main()
{
float distance = v_texcoord.y;
if (v_caps.x < 0.0)
{
gl_FragColor = cap(1, v_texcoord.x, v_texcoord.y,
v_linewidth, v_antialias, v_color);
// Do not return here or clipping won't be enforced
// return;
}
else if (v_caps.y > v_length)
{
gl_FragColor = cap(1, v_texcoord.x-v_length, v_texcoord.y,
v_linewidth, v_antialias, v_color);
// Do not return here or clipping won't be enforced
// return;
}
// Round join (instead of miter)
// if (v_texcoord.x < 0.0) { distance = length(v_texcoord); }
// else if(v_texcoord.x > v_length) { distance = length(v_texcoord - vec2(v_length, 0.0)); }
else {
// Miter limit
float t = (v_miter_limit-1.0)*(v_linewidth/2.0) + v_antialias;
if( (v_texcoord.x < 0.0) && (v_bevel_distance.x > (abs(distance) + t)) )
{
distance = v_bevel_distance.x - t;
}
else if( (v_texcoord.x > v_length) && (v_bevel_distance.y > (abs(distance) + t)) )
{
distance = v_bevel_distance.y - t;
}
gl_FragColor = stroke(distance, v_linewidth, v_antialias, v_color);
}
}
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