!!ver 100 450
!!permu FOG
!!samps diffuse lightmap

#include "sys/defs.h"
#include "sys/fog.h"

varying vec2 tc;

#ifdef LIT
varying vec2 lm0;
#endif



#ifdef VERTEX_SHADER
void main ()
{
	tc = v_texcoord.st;

	#ifdef FLOW
	tc.s += e_time * -0.5;
	#endif

	#ifdef LIT
	lm0 = v_lmcoord;
	#endif

	gl_Position = ftetransform();
}
#endif



#ifdef FRAGMENT_SHADER
void main ()
{
	vec2 ntc;
	ntc.s = tc.s + sin(tc.t+e_time)*0.125;
	ntc.t = tc.t + cos(tc.s+e_time)*0.125;
	vec3 ts = vec3(texture2D(s_diffuse, ntc));

	#ifdef LIT
	ts *= (texture2D(s_lightmap, lm0) * e_lmscale).rgb;
	#endif

	#ifdef ALPHA
	gl_FragColor = fog4blend(vec4(ts, float(ALPHA)) * e_colourident);
	#else
	gl_FragColor = fog4(vec4(ts, 1.0) * e_colourident);
	#endif
}
#endif