df shadows

[carveJwlIkooP6JGAAIwe30JlM.git] / shaders / gpos.h

diff --git a/shaders/gpos.h b/shaders/gpos.h
index 2f4440db78c899b68542ce010f21595c7c5394fc..e30d276cb199377ea611327191621d33a88a7b75 100644 (file)
--- a/shaders/gpos.h
+++ b/shaders/gpos.h
@@ -68,6 +68,8 @@ static struct vg_shader _shader_gpos = {
 "out vec4 FragColor;\n"
 "\n"
 "uniform vec3 uCamera;\n"
+"uniform vec3 uBoard0;\n"
+"uniform vec3 uBoard1;\n"
 "\n"
 "in vec4 aColour;\n"
 "in vec2 aUv;\n"
@@ -152,6 +154,16 @@ static struct vg_shader _shader_gpos = {
 "   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"
@@ -172,6 +184,13 @@ static struct vg_shader _shader_gpos = {
 "   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"
@@ -181,7 +200,7 @@ static struct vg_shader _shader_gpos = {
 "   return mix( vfrag, vec3(0.55,0.76,1.0), min( 1.0, dist ) );\n"
 "}\n"
 "\n"
-"#line     12        0 \n"
+"#line     14        0 \n"
 "\n"
 "// Water blending\n"
 "// ==============\n"
@@ -209,6 +228,8 @@ static GLuint _uniform_gpos_uMdl;
 static GLuint _uniform_gpos_uPv;
 static GLuint _uniform_gpos_uPvmPrev;
 static GLuint _uniform_gpos_uCamera;
+static GLuint _uniform_gpos_uBoard0;
+static GLuint _uniform_gpos_uBoard1;
 static GLuint _uniform_gpos_g_world_depth;
 static void shader_gpos_uMdl(m4x3f m){
    glUniformMatrix4x3fv(_uniform_gpos_uMdl,1,GL_FALSE,(float*)m);
@@ -222,6 +243,12 @@ static void shader_gpos_uPvmPrev(m4x4f m){
 static void shader_gpos_uCamera(v3f v){
    glUniform3fv(_uniform_gpos_uCamera,1,v);
 }
+static void shader_gpos_uBoard0(v3f v){
+   glUniform3fv(_uniform_gpos_uBoard0,1,v);
+}
+static void shader_gpos_uBoard1(v3f v){
+   glUniform3fv(_uniform_gpos_uBoard1,1,v);
+}
 static void shader_gpos_g_world_depth(int i){
    glUniform1i(_uniform_gpos_g_world_depth,i);
 }
@@ -234,6 +261,8 @@ static void shader_gpos_link(void){
    _uniform_gpos_uPv = glGetUniformLocation( _shader_gpos.id, "uPv" );
    _uniform_gpos_uPvmPrev = glGetUniformLocation( _shader_gpos.id, "uPvmPrev" );
    _uniform_gpos_uCamera = glGetUniformLocation( _shader_gpos.id, "uCamera" );
+   _uniform_gpos_uBoard0 = glGetUniformLocation( _shader_gpos.id, "uBoard0" );
+   _uniform_gpos_uBoard1 = glGetUniformLocation( _shader_gpos.id, "uBoard1" );
    _uniform_gpos_g_world_depth = glGetUniformLocation( _shader_gpos.id, "g_world_depth" );
 }
 #endif /* SHADER_gpos_H */