Hello,
If I use a varying float variable in a fragment shader I have no more dashed lines. If I comment the line then all works well...
On an ATI X1300/X1550, with the basic shaders below, glLineStipple has no effect if I uncomment the red line !
And in the sample to reproduce below I do not use this variable !
In my "real" shader I need a variable to compute lighting : so I have light but I have no more dashed lines...
Vertex shader :
#version 110
varying vec3 N;
varying float vx;
void main(void)
{
gl_ClipVertex = gl_ModelViewMatrix * gl_Vertex;
vx = 1.0;
N = normalize(gl_NormalMatrix * gl_Normal);
gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
}
Fragment shader :
#version 110
varying vec3 N;
varying float vx;
void main (void)
{
vec3 L = normalize(gl_LightSource[0].position.xyz);
float vvx = vx; // If I comment this useless line the card draws again dashed lines
vec3 R = normalize(-reflect(L,N));
gl_FragColor = vec4(1,0,0,1);
return;
}
Did you already see some strange things like this ? Do you have an idea of what can cause the problem ?
Thanks.
