git-svn-id: svn://db.shs.com.ru/libs@626 a8b55f48-bf90-11e4-a774-851b48703e85

qglengine/shaders/ds_light.glsl

@@ -0,0 +1,144 @@
+// vert //
+
+out vec3 view_dir;
+
+uniform vec4 view_corners[4];
+
+void main(void) {
+	gl_Position = qgl_ftransform();
+	view_dir = view_corners[gl_VertexID].xyz;
+}
+
+
+// frag //
+
+in vec3 view_dir;
+
+uniform vec2 dt;
+uniform float z_near;
+uniform sampler2D tex_0, tex_1, tex_2, tex_3, tex_4;
+uniform sampler2D tex_d;
+uniform int lights_count;
+
+const vec3 luma = vec3(0.299, 0.587, 0.114);
+const float _pe = 2.4e-7;
+
+vec4 pos, lpos, shp;
+vec3 li, si, ldir, halfV, bn, bn2, lwdir;
+//vec3 vds, vds2;
+float shm_diff, shm_spec, dist, NdotL, NdotH, spot, ldist, diff, sdist, shadow;
+
+void calcLight(in int index, in vec3 n, in vec3 v) {
+	lpos = qgl_light_position[index].position;
+	ldir = lpos.xyz - (pos.xyz * lpos.w);
+	ldist = length(ldir);
+	ldir = normalize(ldir);
+	halfV = normalize(ldir + v);
+	NdotL = max(dot(n, ldir), 1E-6);
+	NdotH = max(dot(n, halfV), 1E-6);
+	spot = step(1.01E-6, NdotL) * qgl_light_parameter[index].intensity;
+	/*if (qgl_Light[index].endAngle <= 90.) {
+		float scos = max(dot(-ldir, qgl_Light[index].direction.xyz), 0.);
+		spot *= scos * step(qgl_Light[index].endAngleCos, scos);
+		spot *= smoothstep(qgl_Light[index].endAngleCos, qgl_Light[index].startAngleCos, scos);
+		//lwdir = mat3(mat_viewi) * qgl_Light[index].direction.xyz;
+		//bn = normalize(cross(lwdir, vec3(1, 0, 0)));
+		//bn2 = normalize(cross(lwdir, bn));
+		float ds = ldist/200.;//max(abs(sdist) / 5000, 0.02);
+		//spot *= clamp(1. - sdist, 0, 1);
+		vds = ds * bn.xyz;
+		vds2 = ds * bn2.xyz;
+		float shadow  = getShadow(index, pos.xyz, vec3(0)) * 3.;
+			  shadow += getShadow(index, pos.xyz,   vds                    ) * 2.;
+			  shadow += getShadow(index, pos.xyz, - vds                    ) * 2.;
+			  shadow += getShadow(index, pos.xyz,             - vds2       ) * 2.;
+			  shadow += getShadow(index, pos.xyz,             + vds2       ) * 2.;
+			  //shadow += getShadow(index, pos.xyz,   vds       - vds2       ) * 1.5;
+			  //shadow += getShadow(index, pos.xyz,   vds       + vds2       ) * 1.5;
+			  //shadow += getShadow(index, pos.xyz, - vds       - vds2       ) * 1.5;
+			  //shadow += getShadow(index, pos.xyz, - vds       + vds2       ) * 1.5;
+			  //shadow += getShadow(index, pos.xyz,   vds + vds              );
+			  //shadow += getShadow(index, pos.xyz, - vds - vds              );
+			  //shadow += getShadow(index, pos.xyz,             - vds2 - vds2);
+			  //shadow += getShadow(index, pos.xyz,             + vds2 + vds2);
+			  //shadow += getShadow(index, pos.xyz,   vds + vds - vds2       );
+			  //shadow += getShadow(index, pos.xyz, - vds - vds - vds2       );
+			  //shadow += getShadow(index, pos.xyz,   vds + vds + vds2       );
+			  //shadow += getShadow(index, pos.xyz, - vds - vds + vds2       );
+			  //shadow += getShadow(index, pos.xyz,   vds       - vds2 - vds2);
+			  //shadow += getShadow(index, pos.xyz,   vds       + vds2 + vds2);
+			  //shadow += getShadow(index, pos.xyz, - vds       - vds2 - vds2);
+			  //shadow += getShadow(index, pos.xyz, - vds       + vds2 + vds2);
+			  //shadow += shadow += getShadow(index, pos.xyz, vds+vds2)*10;
+		spot *= mix(1., shadow / 11., shadow_on);
+	}*/
+	//spot /= (qgl_Light[index].constantAttenuation + ldist * (qgl_Light[index].linearAttenuation + ldist * qgl_Light[index].quadraticAttenuation));
+	//li += spot * gl_LightSource[index].diffuse.rgb * light_diffuse(0, ldir, n);
+	//si += spot * qgl_Light[index].color.rgb * shm_diff * light_specular(0, ldir, n, halfV, v, sh_pow);
+	float NdotLs = NdotL*NdotL;
+	float NdotHs = NdotH*NdotH;
+	
+	float ndlc = (1. - NdotLs) / NdotLs;
+	float der = NdotLs * (shm_diff + ndlc);
+	diff = 2. / (1. + sqrt(1. + (1. - shm_diff) * ndlc));
+	li += spot * diff * qgl_light_parameter[index].color.rgb;// * light_diffuse(0, ldir, n);
+	
+	ndlc = (1. - NdotHs) / NdotHs;
+	der = NdotHs * (shm_spec + ndlc);
+	si += spot * (shm_spec / (der*der) / 3.1416) * qgl_light_parameter[index].color.rgb;
+}
+
+void main(void) {
+	ivec2 tc = ivec2(gl_FragCoord.xy);
+	float z = texelFetch(tex_d, tc, 0).r;
+	if (z == 1.) {
+		qgl_FragColor = vec4(0);
+		return;
+	}
+	vec4 v0 = texelFetch(tex_0, tc, 0),
+		 v1 = texelFetch(tex_1, tc, 0),
+		 v2 = texelFetch(tex_2, tc, 0),
+		 v3 = texelFetch(tex_3, tc, 0),
+		 v4 = texelFetch(tex_4, tc, 0);
+
+	z = z + z - 1;
+	z = ((_pe - 2.) * z_near) / (z + _pe - 1.); // infinite depth
+
+	pos.w = 1;
+	pos.xyz = view_dir * z;
+	//pos.z = -pos.z;
+	vec3 v = normalize(-pos.xyz);
+
+	//vec2 sp = gl_FragCoord.xy * dt * 2 - vec2(1, 1);
+	vec3 diffuse       = v0.rgb;
+	vec3 normal        = v1.xyz;
+	vec3 specular      = v2.rgb;
+	vec3 emission      = v3.rgb;
+	float roughness    = v0.w;
+	float reflectivity = v1.w;
+	float height       = v2.w;
+	//bn = normalize(vec3(v3.w, v4.zw));
+	//bn2 = normalize(cross(n, bn));
+
+	shm_diff = max(roughness, 0.00001);
+	roughness = roughness*roughness*roughness;
+	shm_spec = max(roughness, 0.00001);
+	//sh_pow = 1. / max(roughness, 0.00001);
+	li = vec3(0.);//qgl_AmbientLight.color.rgb * qgl_AmbientLight.intensity;
+	si = vec3(0.);
+	for (int i = 0; i < lights_count; ++i)
+		calcLight(i, normal, v);
+	//	calcLight(0, n, v, v2);
+
+	//calcLight(0, normal, v);
+	
+	qgl_FragColor.rgb = max(vec3(0), li * diffuse + si * specular + emission);
+	qgl_FragColor.a = 1;
+
+
+	//qgl_FragData[4] = vec4(speed.xy, bn.yz);
+
+	//ivec2 itc = ivec2(gl_FragCoord.xy);
+	//qgl_FragData[0].rgb = vec3(dot(n,vec3(0,0,1)));
+	//qgl_FragData[0].rgb = diffuse.rgb * dot(n,vec3(0,0,1));
+}