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[drape] line shader optimization

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ExMix 2014-11-18 13:38:50 +03:00 • committed by Alex Zolotarev
parent 8d76e8fee4
commit e3d23660d2
1 changed files with 10 additions and 16 deletions
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26
drape/shaders/line_fragment_shader.fsh
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@ -17,29 +17,23 @@ varying vec3 v_mask;
void main(void)
{
float r = v_radius.y;
float dist = abs(v_radius.x);
float squareDist = v_radius.x * v_radius.x;
float squareRadius = v_radius.y * v_radius.y;
float capY = (v_dx + 1.0 * sign(v_dx)) * v_radius.z / 2.0;
float joinY = (v_dx + 1.0) * v_radius.y / 2.0;
if (v_type.x < -0.5)
{
float y = (v_dx + 1.0) * v_radius.y / 2.0;
float y = joinY;
if (v_type.y < 0.5)
y = v_radius.y - (v_dx + 1.0) * v_radius.y / 2.0;
y = v_radius.y - joinY;
float sq = dist * dist + y * y;
if (sq >= v_radius.y * v_radius.y)
if (squareDist + y * y > squareRadius)
discard;
}
else
{
if (v_type.y > 0.1 && abs(v_dx) >= 1.0)
{
float y = (v_dx + 1.0 * sign(v_dx)) * v_radius.z / 2.0;
float gip2 = dist * dist + y * y;
if(gip2 > v_radius.y * v_radius.y)
discard;
}
}
else if (v_type.y > 0.1 && abs(v_dx) >= 1.0 && (squareDist + capY > squareRadius))
discard;
vec4 color = getTexel(int(v_color.z), v_color.xy);
color.a = getTexel(int(v_mask.z), v_mask.xy).a;