df shadows

[carveJwlIkooP6JGAAIwe30JlM.git] / shaders / terrain.h

diff --git a/shaders/terrain.h b/shaders/terrain.h
index 8b9452e09c96bb0f65adf1ed11a9a4f5db509de5..09258e744221022a5961ee9b753ea18756b3f796 100644 (file)
--- a/shaders/terrain.h
+++ b/shaders/terrain.h
@@ -70,6 +70,8 @@ static struct vg_shader _shader_terrain = {
 "uniform vec3 uCamera;\n"
 "uniform vec3 uSandColour;\n"
 "uniform vec2 uBlendOffset;\n"
+"uniform vec3 uBoard0;\n"
+"uniform vec3 uBoard1;\n"
 "\n"
 "in vec4 aColour;\n"
 "in vec2 aUv;\n"
@@ -154,6 +156,16 @@ static struct vg_shader _shader_terrain = {
 "   return mix( vfrag, g_ambient_colour.rgb, faccum );\n"
 "}\n"
 "\n"
+"// FIXME\n"
+"float sdLine( vec3 p, vec3 a, vec3 b )\n"
+"{\n"
+"  vec3 pa = p - a;\n"
+"  vec3 ba = b - a;\n"
+"\n"
+"  float h = clamp( dot(pa,ba)/dot(ba,ba), 0.0, 1.0 );\n"
+"  return length( pa - ba*h );\n"
+"}\n"
+"\n"
 "vec3 do_light_shadowing( vec3 vfrag )\n"
 "{\n"
 "   if( g_shadow_samples == 0 )\n"
@@ -174,6 +186,13 @@ static struct vg_shader _shader_terrain = {
 "   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"
+"\n"
+"   // player shadow\n"
+"   float dist_to_player = max( 0.0, sdLine( aWorldCo, uBoard0, uBoard1 )-0.03 );\n"
+"   float player_shadow = max( 1.0-dist_to_player*1.7, 0.0 );\n"
+"   player_shadow *= player_shadow*player_shadow*player_shadow;\n"
+"\n"
+"   famt = max( player_shadow*0.6, famt );\n"
 "   return mix( vfrag, g_ambient_colour.rgb, famt );\n"
 "}\n"
 "\n"
@@ -183,7 +202,7 @@ static struct vg_shader _shader_terrain = {
 "   return mix( vfrag, vec3(0.55,0.76,1.0), min( 1.0, dist ) );\n"
 "}\n"
 "\n"
-"#line     14        0 \n"
+"#line     16        0 \n"
 "#line       1        2 \n"
 "const float k_motion_lerp_amount = 0.01;\n"
 "\n"
@@ -203,7 +222,7 @@ static struct vg_shader _shader_terrain = {
 "   oMotionVec = (vmotion1-vmotion0) * (1.0/k_motion_lerp_amount);\n"
 "}\n"
 "\n"
-"#line     15        0 \n"
+"#line     17        0 \n"
 "\n"
 "void main()\n"
 "{\n"
@@ -218,8 +237,8 @@ static struct vg_shader _shader_terrain = {
 "   \n"
 "   // Creating normal patches\n"
 "   vec3 modnorm = (wgarbage.rgb-0.4) * 1.4;\n"
-"   vec3 qnorm = floor(aNorm*4.0+modnorm)*0.25 + vec3(0.001,0.0,0.0);\n"
-"   vec2 dir = qnorm.xz;\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"
@@ -263,6 +282,8 @@ static GLuint _uniform_terrain_uTexGradients;
 static GLuint _uniform_terrain_uCamera;
 static GLuint _uniform_terrain_uSandColour;
 static GLuint _uniform_terrain_uBlendOffset;
+static GLuint _uniform_terrain_uBoard0;
+static GLuint _uniform_terrain_uBoard1;
 static GLuint _uniform_terrain_g_world_depth;
 static void shader_terrain_uMdl(m4x3f m){
    glUniformMatrix4x3fv(_uniform_terrain_uMdl,1,GL_FALSE,(float*)m);
@@ -288,6 +309,12 @@ static void shader_terrain_uSandColour(v3f v){
 static void shader_terrain_uBlendOffset(v2f v){
    glUniform2fv(_uniform_terrain_uBlendOffset,1,v);
 }
+static void shader_terrain_uBoard0(v3f v){
+   glUniform3fv(_uniform_terrain_uBoard0,1,v);
+}
+static void shader_terrain_uBoard1(v3f v){
+   glUniform3fv(_uniform_terrain_uBoard1,1,v);
+}
 static void shader_terrain_g_world_depth(int i){
    glUniform1i(_uniform_terrain_g_world_depth,i);
 }
@@ -304,6 +331,8 @@ static void shader_terrain_link(void){
    _uniform_terrain_uCamera = glGetUniformLocation( _shader_terrain.id, "uCamera" );
    _uniform_terrain_uSandColour = glGetUniformLocation( _shader_terrain.id, "uSandColour" );
    _uniform_terrain_uBlendOffset = glGetUniformLocation( _shader_terrain.id, "uBlendOffset" );
+   _uniform_terrain_uBoard0 = glGetUniformLocation( _shader_terrain.id, "uBoard0" );
+   _uniform_terrain_uBoard1 = glGetUniformLocation( _shader_terrain.id, "uBoard1" );
    _uniform_terrain_g_world_depth = glGetUniformLocation( _shader_terrain.id, "g_world_depth" );
 }
 #endif /* SHADER_terrain_H */