X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=shaders%2Fsky.h;h=fa0546f5bbb5bce4648615118de2ccb9760b75ac;hb=a1adba47558099cab82aa6d10abdc1dca11d3342;hp=b93549bcd37165a9e9c32859d4365335dbea4935;hpb=3d8eaabcfd3b87fb52127eaa1241673e8d197bea;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/shaders/sky.h b/shaders/sky.h
index b93549b..fa0546f 100644
--- a/shaders/sky.h
+++ b/shaders/sky.h
@@ -16,9 +16,21 @@ static struct vg_shader _shader_sky = {
 "layout (location=5) in ivec4 a_groups;\n"
 "\n"
 "#line      2        0 \n"
+"#line       1        2 \n"
+"out vec3 aMotionVec0;\n"
+"out vec3 aMotionVec1;\n"
+"\n"
+"void vs_motion_out( vec4 vproj0, vec4 vproj1 )\n"
+"{\n"
+"   aMotionVec0 = vec3( vproj0.xy, vproj0.w );\n"
+"   aMotionVec1 = vec3( vproj1.xy, vproj1.w );\n"
+"}\n"
+"\n"
+"#line      3        0 \n"
 "\n"
 "uniform mat4x3 uMdl;\n"
 "uniform mat4 uPv;\n"
+"uniform mat4 uPvmPrev;\n"
 "\n"
 "out vec4 aColour;\n"
 "out vec2 aUv;\n"
@@ -28,19 +40,24 @@ static struct vg_shader _shader_sky = {
 "\n"
 "void main()\n"
 "{\n"
-"   vec3 world_pos = uMdl * vec4(a_co,1.0);\n"
-"   gl_Position = uPv * vec4( world_pos, 1.0 );\n"
+"   vec3 world_pos0 = uMdl     * vec4( a_co, 1.0 );\n"
+"   vec4 vproj0     = uPv      * vec4( world_pos0, 1.0 );\n"
+"   vec4 vproj1     = uPvmPrev * vec4( a_co, 1.0 );\n"
+"\n"
+"   vs_motion_out( vproj0, vproj1 );\n"
+"\n"
+"   gl_Position = vproj0;\n"
+"   aWorldCo = world_pos0;\n"
 "   aColour = a_colour;\n"
 "   aUv = a_uv;\n"
 "   aNorm = mat3(uMdl) * a_norm;\n"
 "   aCo = a_co;\n"
-"   aWorldCo = world_pos;\n"
 "}\n"
 ""},
    .fs = 
 {
 .static_src = 
-"out vec4 FragColor;\n"
+"layout (location = 0) out vec4 oColour;\n"
 "\n"
 "uniform vec4 uColour;\n"
 "uniform sampler2D uTexGarbage;\n"
@@ -51,8 +68,26 @@ static struct vg_shader _shader_sky = {
 "in vec3 aNorm;\n"
 "in vec3 aCo;\n"
 "\n"
+"#line       1        1 \n"
+"layout (location = 1) out vec2 oMotionVec;\n"
+"\n"
+"in vec3 aMotionVec0;\n"
+"in vec3 aMotionVec1;\n"
+"\n"
+"void compute_motion_vectors()\n"
+"{\n"
+"   // Write motion vectors\n"
+"   vec2 vmotion0 = aMotionVec0.xy / aMotionVec0.z;\n"
+"   vec2 vmotion1 = aMotionVec1.xy / aMotionVec1.z;\n"
+"   oMotionVec = vmotion1-vmotion0;\n"
+"}\n"
+"\n"
+"#line     13        0 \n"
+"\n"
 "void main()\n"
 "{\n"
+"   compute_motion_vectors();\n"
+"\n"
 "   float fintensity = 1.0-(abs(aNorm.y)*0.7);\n"
 "   float fblend = pow(fintensity,4.0);\n"
 "   vec3 horizon = vec3( 0.8, 0.9, 0.9 );\n"
@@ -71,13 +106,14 @@ static struct vg_shader _shader_sky = {
 "   float fhorizon = step( aNorm.y * 0.5 + 0.5, 0.5 );\n"
 "\n"
 "   vec3 skycomp = mix(diffuse, vec3(1.0,1.0,1.0), cloud_e);\n"
-"   FragColor = vec4(pow(skycomp, vec3(1.5)),1.0);\n"
+"   oColour = vec4(pow(skycomp, vec3(1.5)),1.0);\n"
 "}\n"
 ""},
 };
 
 static GLuint _uniform_sky_uMdl;
 static GLuint _uniform_sky_uPv;
+static GLuint _uniform_sky_uPvmPrev;
 static GLuint _uniform_sky_uColour;
 static GLuint _uniform_sky_uTexGarbage;
 static GLuint _uniform_sky_uTime;
@@ -87,6 +123,9 @@ static void shader_sky_uMdl(m4x3f m){
 static void shader_sky_uPv(m4x4f m){
    glUniformMatrix4fv(_uniform_sky_uPv,1,GL_FALSE,(float*)m);
 }
+static void shader_sky_uPvmPrev(m4x4f m){
+   glUniformMatrix4fv(_uniform_sky_uPvmPrev,1,GL_FALSE,(float*)m);
+}
 static void shader_sky_uColour(v4f v){
    glUniform4fv(_uniform_sky_uColour,1,v);
 }
@@ -103,6 +142,7 @@ static void shader_sky_use(void){ glUseProgram(_shader_sky.id); }
 static void shader_sky_link(void){
    _uniform_sky_uMdl = glGetUniformLocation( _shader_sky.id, "uMdl" );
    _uniform_sky_uPv = glGetUniformLocation( _shader_sky.id, "uPv" );
+   _uniform_sky_uPvmPrev = glGetUniformLocation( _shader_sky.id, "uPvmPrev" );
    _uniform_sky_uColour = glGetUniformLocation( _shader_sky.id, "uColour" );
    _uniform_sky_uTexGarbage = glGetUniformLocation( _shader_sky.id, "uTexGarbage" );
    _uniform_sky_uTime = glGetUniformLocation( _shader_sky.id, "uTime" );