X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=shaders%2Fterrain.h;h=436ca1fc06559333cc88d454a6fe48c9838e21bc;hb=168eb5c363f510d60703498e01ffcdb52bf9fd07;hp=42e87aa62a98397ac40339c4c8503fa48b2943bf;hpb=7758c7efec3956c68294bc914e7524045a2b1bd7;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/shaders/terrain.h b/shaders/terrain.h
index 42e87aa..436ca1f 100644
--- a/shaders/terrain.h
+++ b/shaders/terrain.h
@@ -7,7 +7,7 @@ static struct vg_shader _shader_terrain = {
    .link = shader_terrain_link,
    .vs = 
 {
-.orig_file = "../shaders/terrain.vs",
+.orig_file = "../shaders/standard.vs",
 .static_src = 
 "layout (location=0) in vec3 a_co;\n"
 "layout (location=1) in vec3 a_norm;\n"
@@ -41,31 +41,155 @@ static struct vg_shader _shader_terrain = {
 "\n"
 "uniform sampler2D uTexGarbage;\n"
 "uniform sampler2D uTexGradients;\n"
+"uniform vec3 uCamera;\n"
 "\n"
 "in vec4 aColour;\n"
 "in vec2 aUv;\n"
 "in vec3 aNorm;\n"
 "in vec3 aCo;\n"
 "\n"
+"#line       1        1 \n"
+"layout (std140) uniform ub_world_lighting\n"
+"{\n"
+"   vec4 g_light_colours[3];\n"
+"   vec4 g_light_directions[3];\n"
+"   vec4 g_ambient_colour;\n"
+"\n"
+"   vec4 g_water_plane;\n"
+"   vec4 g_depth_bounds;\n"
+"   float g_water_fog;\n"
+"   int g_light_count;\n"
+"   int g_light_preview;\n"
+"};\n"
+"\n"
+"uniform sampler2D g_world_depth;\n"
+"\n"
+"// Standard diffuse + spec models\n"
+"// ==============================\n"
+"\n"
+"vec3 do_light_diffuse( vec3 vfrag, vec3 wnormal )\n"
+"{\n"
+"   vec3 vtotal = g_ambient_colour.rgb;\n"
+"\n"
+"   for( int i=0; i<g_light_count; i++ )\n"
+"   {\n"
+"      vec3 vcolour = g_light_colours[i].rgb;\n"
+"      vec3 vdir = g_light_directions[i].xyz;\n"
+"\n"
+"      float flight = max(dot( vdir, wnormal )*0.75+0.25,0.0);\n"
+"      vtotal += vcolour*flight;\n"
+"   }\n"
+"\n"
+"   return vfrag * vtotal;\n"
+"}\n"
+"\n"
+"vec3 do_light_spec( vec3 vfrag, vec3 wnormal, vec3 halfview, float fintensity )\n"
+"{\n"
+"   vec3 vcolour = g_light_colours[0].rgb;\n"
+"   vec3 vdir = g_light_directions[0].xyz;\n"
+"\n"
+"   vec3 specdir = reflect( -vdir, wnormal );\n"
+"   float spec = pow(max(dot( halfview, specdir ), 0.0), 10.0);\n"
+"   return vfrag + vcolour*spec*fintensity;\n"
+"}\n"
+"\n"
+"float world_depth_sample( vec3 pos )\n"
+"{\n"
+"   vec2 depth_coord = (pos.xz - g_depth_bounds.xy) * g_depth_bounds.zw; \n"
+"   return texture( g_world_depth, depth_coord ).r;\n"
+"}\n"
+"\n"
+"float shadow_sample( vec3 vdir )\n"
+"{\n"
+"   vec3 sample_pos = aCo + vdir;\n"
+"   float height_sample = world_depth_sample( sample_pos );\n"
+"\n"
+"   float fdelta = height_sample - sample_pos.y;\n"
+"   return clamp( fdelta, 0.1, 0.2 )-0.1;\n"
+"}\n"
+"\n"
+"vec3 do_light_shadowing_old( vec3 vfrag )\n"
+"{\n"
+"   float faccum = 0.0;\n"
+"   faccum += shadow_sample( vec3( 0.0, 0.5, 0.0 ));\n"
+"   faccum += shadow_sample( vec3( 2.0, 0.3, 0.0 ));\n"
+"   faccum += shadow_sample( vec3( 3.0, 1.0, 0.0 ));\n"
+"   faccum += shadow_sample( vec3( 5.0, 1.0, 0.0 ));\n"
+"   faccum += shadow_sample( vec3( 0.0, 0.5, 0.0 )*1.5);\n"
+"   faccum += shadow_sample( vec3( 2.0, 0.3, 0.0 )*1.5);\n"
+"   faccum += shadow_sample( vec3( 3.0, 1.0, 0.0 )*1.5);\n"
+"   faccum += shadow_sample( vec3( 5.0, 1.0, 0.0 )*1.5);\n"
+"   return mix( vfrag, g_ambient_colour.rgb, faccum );\n"
+"}\n"
+"\n"
+"vec3 do_light_shadowing( vec3 vfrag )\n"
+"{\n"
+"   float fspread = g_light_colours[0].w;\n"
+"   vec3  vdir = g_light_directions[0].xyz;\n"
+"   float flength = g_light_directions[0].w;\n"
+"\n"
+"   float famt = 0.0;\n"
+"   famt+=shadow_sample((vdir+vec3(-0.563, 0.550, 0.307)*fspread)*flength*0.1);\n"
+"   famt+=shadow_sample((vdir+vec3( 0.808, 0.686, 0.346)*fspread)*flength*0.2);\n"
+"   famt+=shadow_sample((vdir+vec3( 0.787, 0.074,-0.065)*fspread)*flength*0.3);\n"
+"   famt+=shadow_sample((vdir+vec3(-0.593, 0.071,-0.425)*fspread)*flength*0.4);\n"
+"   famt+=shadow_sample((vdir+vec3(-0.790,-0.933,-0.875)*fspread)*flength*0.5);\n"
+"   famt+=shadow_sample((vdir+vec3( 0.807,-0.690, 0.472)*fspread)*flength*0.6);\n"
+"   famt+=shadow_sample((vdir+vec3( 0.522,-0.379, 0.350)*fspread)*flength*0.7);\n"
+"   famt+=shadow_sample((vdir+vec3( 0.483, 0.201, 0.306)*fspread)*flength*0.8);\n"
+"   return mix( vfrag, g_ambient_colour.rgb, famt );\n"
+"}\n"
+"\n"
+"vec3 apply_fog( vec3 vfrag, float fdist )\n"
+"{\n"
+"   float dist = pow(fdist*0.0008,1.2);\n"
+"   return mix( vfrag, vec3(0.55,0.76,1.0), min( 1.0, dist ) );\n"
+"}\n"
+"\n"
+"#line     13        0 \n"
+"\n"
 "void main()\n"
 "{\n"
+"   vec3 vfrag = vec3(0.5,0.5,0.5);\n"
+"\n"
+"   // ws modulation\n"
 "   vec4 wgarbage = texture( uTexGarbage, aCo.xz * 0.015 );\n"
+"   \n"
+"   // Creating normal patches\n"
 "   vec3 modnorm = (wgarbage.rgb-0.4) * 1.4;\n"
-"   vec3 qnorm = floor(aNorm*4.0+modnorm) * 0.25;\n"
-"\n"
+"   vec3 qnorm = normalize(floor(aNorm*4.0+modnorm)*0.25) + vec3(0.001,0.0,0.0);\n"
 "   vec2 dir = normalize(qnorm.xz);\n"
 "   vec2 uvdiffuse = aCo.xz * 0.02;\n"
 "   uvdiffuse = mat2(dir.y, dir.x, -dir.x, dir.y) * uvdiffuse;\n"
-"\n"
+"   \n"
+"   // Patch local noise\n"
 "   vec4 rgarbage = texture( uTexGarbage, uvdiffuse );\n"
+"\n"
+"   // Colour blending\n"
 "   float amtgrass = step(qnorm.y,0.6);\n"
-"   vec2 uvgradients = vec2( rgarbage.a, -amtgrass*0.125 ) + aUv;\n"
-"   vec3 diffuse = texture( uTexGradients, uvgradients ).rgb;\n"
+"   float amtsand = min(max((aCo.y - 10.0) * -0.1,0.0)*qnorm.y,1.0);\n"
+"   vec2 uvgradients = aUv + vec2( amtgrass*0.5 + rgarbage.a*0.4, 0.0 );\n"
+"   vfrag = texture( uTexGradients, uvgradients ).rgb;\n"
+"   vfrag = mix( vfrag, vec3(1.0,0.9,0.8)*0.9, amtsand );\n"
+"\n"
+"   qnorm = mix( qnorm, aNorm, amtsand );\n"
 "   \n"
-"   vec3 shadow = pow(vec3(0.014,0.034,0.084),vec3(1.0/3.2));\n"
-"   float light1 = 1.0-(dot( vec3(0.95,0.0,-0.3), qnorm )*0.5+0.5);\n"
+"   if( g_light_preview == 1 )\n"
+"   {\n"
+"      vfrag = vec3(0.5);\n"
+"   }\n"
+"\n"
+"   // Lighting\n"
+"   vec3 halfview = uCamera - aCo;\n"
+"   float fdist = length( halfview );\n"
+"   halfview /= fdist;\n"
+"\n"
+"   vfrag = do_light_diffuse( vfrag, qnorm );\n"
+"   vfrag = do_light_spec( vfrag, qnorm, halfview, 0.1 );\n"
+"   vfrag = do_light_shadowing( vfrag );\n"
+"   vfrag = apply_fog( vfrag, fdist );\n"
 "\n"
-"   FragColor = vec4(diffuse*(1.0-light1)+diffuse*shadow*light1, 1.0);\n"
+"   FragColor = vec4(vfrag, 1.0 );\n"
 "}\n"
 ""},
 };
@@ -74,6 +198,8 @@ static GLuint _uniform_terrain_uPv;
 static GLuint _uniform_terrain_uMdl;
 static GLuint _uniform_terrain_uTexGarbage;
 static GLuint _uniform_terrain_uTexGradients;
+static GLuint _uniform_terrain_uCamera;
+static GLuint _uniform_terrain_g_world_depth;
 static void shader_terrain_uPv(m4x4f m){
    glUniformMatrix4fv( _uniform_terrain_uPv, 1, GL_FALSE, (float *)m );
 }
@@ -86,6 +212,12 @@ static void shader_terrain_uTexGarbage(int i){
 static void shader_terrain_uTexGradients(int i){
    glUniform1i( _uniform_terrain_uTexGradients, i );
 }
+static void shader_terrain_uCamera(v3f v){
+   glUniform3fv( _uniform_terrain_uCamera, 1, v );
+}
+static void shader_terrain_g_world_depth(int i){
+   glUniform1i( _uniform_terrain_g_world_depth, i );
+}
 static void shader_terrain_register(void){
    vg_shader_register( &_shader_terrain );
 }
@@ -95,5 +227,7 @@ static void shader_terrain_link(void){
    _uniform_terrain_uMdl = glGetUniformLocation( _shader_terrain.id, "uMdl" );
    _uniform_terrain_uTexGarbage = glGetUniformLocation( _shader_terrain.id, "uTexGarbage" );
    _uniform_terrain_uTexGradients = glGetUniformLocation( _shader_terrain.id, "uTexGradients" );
+   _uniform_terrain_uCamera = glGetUniformLocation( _shader_terrain.id, "uCamera" );
+   _uniform_terrain_g_world_depth = glGetUniformLocation( _shader_terrain.id, "g_world_depth" );
 }
 #endif /* SHADER_terrain_H */