X-Git-Url: https://harrygodden.com/git/?a=blobdiff_plain;f=render.h;h=f77f10625ef1ee8b71bae081bc310e82b3863346;hb=b4c9550f206c476bb38b0bb2855d35e6b31bee83;hp=d8bdc95ea21503662a93fc85d06690d5b49299ae;hpb=dfee9022b3513fddec36f7ea70867ee5961a44da;p=carveJwlIkooP6JGAAIwe30JlM.git

diff --git a/render.h b/render.h
index d8bdc95..f77f106 100644
--- a/render.h
+++ b/render.h
@@ -1,9 +1,15 @@
-#ifndef RENDER_H
-#define RENDER_H
-
 #include "common.h"
 #include "model.h"
 
+static void render_water_texture( m4x3f camera );
+static void render_water_surface( m4x4f pv, m4x3f camera );
+static void render_world( m4x4f projection, m4x3f camera );
+static void shader_link_standard_ub( GLuint shader, int texture_id );
+static void render_world_depth( m4x4f projection, m4x3f camera );
+
+#ifndef RENDER_H
+#define RENDER_H
+
 static struct pipeline
 {
    float fov;
@@ -11,20 +17,70 @@ static struct pipeline
 
    GLuint fb_background,
           rgb_background;
-}
-gpipeline;
 
-struct framebuffer
+   /* STD140 */
+   struct ub_world_lighting
+   {
+      /* v3f (padded) */
+      v4f g_light_colours[3],
+          g_light_directions[3],
+          g_ambient_colour;
+
+      v4f g_water_plane,
+          g_depth_bounds;
+
+      float g_water_fog;
+      int g_light_count;
+      int g_light_preview;
+   }
+   ub_world_lighting;
+
+   struct light_widget
+   {
+      int enabled;
+      v2f dir;
+      v3f colour;
+   } 
+   widgets[3];
+
+   float shadow_spread, shadow_length;
+
+   GLuint fb_depthmap, rgb_depthmap;
+   GLuint ubo_world_lighting,
+          ubo_world;
+}
+gpipeline =
 {
-   GLuint fb, colour, rb;
-   int div;
-   GLuint format;
-};
+   .widgets =
+   {
+      {
+         .enabled = 1,
+         .colour = { 1.36f, 1.35f, 1.01f },
+         .dir = { 0.63f, -0.08f }
+      },
+      {
+         .enabled = 1,
+         .colour = { 0.33f, 0.56f, 0.64f },
+         .dir = { -2.60f, -0.13f }
+      },
+      {
+         .enabled = 1,
+         .colour = { 0.05f, 0.05f, 0.23f },
+         .dir = { 2.60f, -0.84f }
+      }
+   },
+   .shadow_spread = 0.65f,
+   .shadow_length = 9.50f,
 
-static void render_water_texture( m4x3f camera );
-static void render_water_surface( m4x4f pv, m4x3f camera );
-static void render_world( m4x4f projection, m4x3f camera );
+   .ub_world_lighting =
+   {
+      .g_ambient_colour = { 0.09f, 0.03f, 0.07f }
+   }
+};
 
+/* 
+ * Matrix Projections
+ */
 /* 
  * http://www.terathon.com/lengyel/Lengyel-Oblique.pdf 
  */
@@ -54,6 +110,72 @@ static void pipeline_projection( m4x4f mat, float nearz, float farz )
          nearz, farz );
 }
 
+/*
+ * Shaders
+ */
+static void shader_link_standard_ub( GLuint shader, int texture_id )
+{
+   GLuint idx = glGetUniformBlockIndex( shader, "ub_world_lighting" );   
+   glUniformBlockBinding( shader, idx, 0 );
+
+   glActiveTexture( GL_TEXTURE0 + texture_id );
+   glBindTexture( GL_TEXTURE_2D, gpipeline.rgb_depthmap );
+   glUniform1i( glGetUniformLocation( shader, "g_world_depth" ), texture_id );
+}
+
+static void render_update_lighting_ub(void)
+{
+   struct ub_world_lighting *winf = &gpipeline.ub_world_lighting;
+   int c = 0;
+
+   for( int i=0; i<3; i++ )
+   {
+      struct light_widget *lw = &gpipeline.widgets[i];
+
+      if( lw->enabled )
+      {
+         float pitch = lw->dir[0],
+               yaw = lw->dir[1],
+               xz = cosf( pitch );
+         
+         v3_copy( (v3f){ xz*cosf(yaw), sinf(pitch), xz*sinf(yaw) }, 
+               winf->g_light_directions[c] );
+         v3_copy( lw->colour, winf->g_light_colours[c] );
+
+         c ++;
+      }
+   }
+
+   winf->g_light_count = c;
+   winf->g_light_directions[0][3] = gpipeline.shadow_length;
+   winf->g_light_colours[0][3] = gpipeline.shadow_spread;
+
+   glBindBuffer( GL_UNIFORM_BUFFER, gpipeline.ubo_world_lighting );
+   glBufferSubData( GL_UNIFORM_BUFFER, 0, sizeof(struct ub_world_lighting),
+         &gpipeline.ub_world_lighting );
+}
+
+static void render_alloc_ub(void)
+{
+   glGenBuffers( 1, &gpipeline.ubo_world_lighting );
+   glBindBuffer( GL_UNIFORM_BUFFER, gpipeline.ubo_world_lighting );
+   glBufferData( GL_UNIFORM_BUFFER, sizeof(struct ub_world_lighting), 
+         NULL, GL_DYNAMIC_DRAW );
+
+   render_update_lighting_ub();
+   glBindBufferBase( GL_UNIFORM_BUFFER, 0, gpipeline.ubo_world_lighting );
+}
+
+/* 
+ * Framebuffers
+ */
+struct framebuffer
+{
+   GLuint fb, colour, rb;
+   int div;
+   GLuint format;
+};
+
 static void fb_use( struct framebuffer *fb )
 {
    if( !fb )
@@ -120,6 +242,9 @@ static void render_fb_resize(void)
          GL_RGB, GL_UNSIGNED_BYTE, NULL );
 }
 
+/*
+ * Vg
+ */
 static void render_init(void)
 {
    glGenFramebuffers( 1, &gpipeline.fb_background );
@@ -136,6 +261,25 @@ static void render_init(void)
          GL_TEXTURE_2D, 
          gpipeline.rgb_background, 0);
 
+   /* 
+    * World depth map, maybe this should be moved to world.h
+    * TODO: review
+    */
+   glGenFramebuffers( 1, &gpipeline.fb_depthmap );
+   glBindFramebuffer( GL_FRAMEBUFFER, gpipeline.fb_depthmap );
+
+   glGenTextures( 1, &gpipeline.rgb_depthmap );
+   glBindTexture( GL_TEXTURE_2D, gpipeline.rgb_depthmap );
+   glTexImage2D( GL_TEXTURE_2D, 0, GL_R32F, 1024, 1024, 0, 
+         GL_RED, GL_FLOAT, NULL );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
+   glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
+   vg_tex2d_clamp();
+
+   glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, 
+         GL_TEXTURE_2D, 
+         gpipeline.rgb_depthmap, 0);
+
    float quad[] = { 0.0f, 0.0f, 1.0f, 1.0f, 0.0f, 1.0f,
                     0.0f, 0.0f, 1.0f, 0.0f, 1.0f, 1.0f };
 
@@ -149,8 +293,18 @@ static void render_init(void)
          sizeof(float)*2, (void*)0 );
    glEnableVertexAttribArray( 0 );
    VG_CHECK_GL();
+
+   render_alloc_ub();
 }
 
+static void render_free(void)
+{
+   /* TODO: ... */
+}
+
+/*
+ * Utility
+ */
 static void render_fsquad(void)
 {
    glBindVertexArray( gpipeline.fsquad.vao );