#version 150

in vec3 src_normal, normal;//, et;
in vec4 pos;
in float fogCoord;

uniform bool acc_fog;
uniform vec2 dt;
uniform float z_far, z_near;

const vec3 luma = vec3(0.299, 0.587, 0.114);

void main(void) {
	float z = pos.w;//((z_near / (z_near-z_far)) * z_far) / (pos.w - (z_far / (z_far-z_near)));
	vec4 dc = qgl_FragColor;
	vec2 tc = qgl_FragTexture.xy;
	float hei = dot(texture2D(qgl_Material.map_relief.map, tc).rgb, luma) * qgl_Material.map_relief.amount + qgl_Material.map_relief.offset;
	//if (acc_fog) dc.xyz = mix(dc.rgb, gl_Fog.color.rgb, fogCoord);

	vec3 n, dn;
	dn = (texture2D(qgl_Material.map_bump.map, tc).rgb - vec3(0.5, 0.5, 1.)) * qgl_Material.map_bump.amount + qgl_Material.map_bump.offset;
	dn.x = -dn.x;
	dn = dn * mat3(qgl_ModelViewMatrixInverse);
	n = normalize(normal - dn);

	/*vec2 dpm = normalize(gl_FragCoord.xy * dt * 2. - vec2(1., 1.)), ntc;
	ntc = gl_FragCoord.xy * dt * 2. - vec2(1., 1.) + dpm * hei;
	dpm = gl_ModelViewProjectionMatrixInverse
	dpm = dpm * gl_ModelViewProjectionMatrixInverse;
	dpm += */
	//tc += 1+et.xy * hei/10;// / et.z;
	dc *= texture2D(qgl_Material.map_diffuse.map, tc) * qgl_Material.map_diffuse.amount + qgl_Material.map_diffuse.offset;

	vec4 spec = texture2D(qgl_Material.map_specular.map, tc) * qgl_Material.map_specular.amount + qgl_Material.map_specular.offset;
	spec *= qgl_Material.color_specular * qgl_Material.specular;
	vec4 rough = texture2D(qgl_Material.map_roughness.map, tc) * qgl_Material.map_roughness.amount + qgl_Material.map_roughness.offset;
	rough *= qgl_Material.roughness;
	vec4 self = texture2D(qgl_Material.map_self_illumination.map, tc) * qgl_Material.map_self_illumination.amount + qgl_Material.map_self_illumination.offset;
	self *= qgl_Material.color_self_illumination;

	qgl_FragData[0] = vec4(dc.rgb, z);
	qgl_FragData[1] = vec4(n.xyz / 2. + vec3(0.5), rough);
	qgl_FragData[2] = vec4(spec.rgb, hei);
	qgl_FragData[3] = vec4(pos.xyz, pos.z);

	//gl_FragData[0] = vec4(et.xyz, pos.w);
	//gl_FragDepth = gl_FragCoord.z - clamp(hei / pos.z / pos.z / (abs(n.z) + 1), -0.01, 0.01);
	/*vec4 dp = pos;
	dp.x = floor(dp.w / 255.) / 255.;
	dp.w -= dp.x * 65025;
	dp.y = floor(dp.w) / 255.;
	dp.w -= dp.y * 255.;
	dp.z = fract(dp.w);*/
	//dp.x = dp.w;
	//dp.w = (gl_FrontMaterial.specular.r + gl_FrontMaterial.specular.g + gl_FrontMaterial.specular.b) / 3. / 25.5;
	//gl_FragData[2] = dp;
	//gl_FragData[3] = vec4(light_model / 255., 0, 0, 0);
}