switch to textured render
[fishladder.git] / fishladder.c
index c928a816437a9342f5246cf7b1eb254aa8424180..4e41b5ad924ba80ba678ed55eb7fd3ec6162cde8 100644 (file)
@@ -27,6 +27,157 @@ SHADER_DEFINE( shader_tile_colour,
        UNIFORMS({ "uPv", "uOffset", "uColour" })
 )
 
+SHADER_DEFINE( shader_ball,
+       // VERTEX
+       "layout (location=0) in vec2 a_co;"
+       "uniform vec2 uOffset;"
+       "uniform mat3 uPv;"
+       ""
+       "out vec2 aTexCoords;"
+       ""
+       "void main()"
+       "{"
+               // Create texture coords
+               "aTexCoords = a_co;"
+               
+               // Vertex transform
+               "vec3 worldpos = vec3( a_co * 0.25 - 0.125 + uOffset, 1.0 );"
+               "gl_Position = vec4( uPv * worldpos, 1.0 );"
+       "}",
+       
+       // FRAGMENT
+       "out vec4 FragColor;"
+       ""
+       "uniform sampler2D uTexMain;"
+       "uniform vec3 uColour;"
+       ""
+       "in vec2 aTexCoords;"
+       ""
+       "void main()"
+       "{"
+               "vec4 glyph = texture( uTexMain, aTexCoords );"
+               "FragColor = vec4( glyph.rgb * uColour, glyph.a );"
+       "}"
+       ,
+       UNIFORMS({ "uTexMain", "uColour", "uOffset", "uPv" })
+)
+
+SHADER_DEFINE( shader_tile_main,
+       // VERTEX
+       "layout (location=0) in vec2 a_co;"
+       "uniform vec4 uOffset;" // Tile x/y, uv x/y
+       "uniform mat3 uPv;"
+       "uniform mat2 uSubTransform;"
+       ""
+       "out vec4 aTexCoords;"
+       ""
+       "vec2 hash22(vec2 p)"
+       "{"
+               "vec3 p3 = fract(vec3(p.xyx) * vec3(.1031, .1030, .0973));"
+               "p3 += dot(p3, p3.yzx+33.33);"
+               "return fract((p3.xx+p3.yz)*p3.zy);"
+       "}"
+       ""
+       "void main()"
+       "{"
+               // Create texture coords
+               "vec2 random_offset = floor(hash22(uOffset.xy) * 4.0) * 0.25;"
+               "vec2 edge_safe_coords = a_co * 0.98 + 0.01;"
+               "aTexCoords = vec4((edge_safe_coords + uOffset.zw) * 0.25, edge_safe_coords * 0.25 + random_offset );"
+               
+               // Vertex transform
+               "vec2 subtransform = uSubTransform * (a_co-0.5) + 0.5;"
+               "vec3 worldpos = vec3( subtransform + uOffset.xy, 1.0 );"
+               "gl_Position = vec4( uPv * worldpos, 1.0 );"
+       "}",
+       
+       // FRAGMENT
+       "out vec4 FragColor;"
+       ""
+       "uniform sampler2D uTexGlyphs;"
+       "uniform sampler2D uTexWood;"
+       ""
+       "in vec4 aTexCoords;"
+       ""
+       "void main()"
+       "{"
+               "vec3 shadowing_colour = vec3( 0.93, 0.88536, 0.8184 );"
+               "vec4 glyph = texture( uTexGlyphs, aTexCoords.xy );"
+               "vec4 wood = texture( uTexWood, aTexCoords.zw );"
+               "vec4 wood_secondary = texture( uTexWood, aTexCoords.zw + 0.25 );"
+               "vec3 wood_comp = mix( wood_secondary.rgb * shadowing_colour, wood.rgb, clamp( glyph.b * 2.0 - 1.0, 0.0, 1.0 ) );"
+               
+               "vec3 shadows = mix( vec3( 0.85, 0.7344, 0.561 ), vec3(1.0,1.0,1.0), glyph.r );"
+               
+               "FragColor = vec4( wood_comp * shadows, glyph.b );"
+       "}"
+       ,
+       UNIFORMS({ "uPv", "uOffset", "uTexGlyphs", "uTexWood", "uSubTransform" })
+)
+
+const char *level_pack[] = 
+{
+       // Level 0
+       "#########;\n"
+       "###-#####;acac\n"
+       "##     ##;\n"
+       "##     ##;\n"
+       "##     ##;\n"
+       "##     ##;\n"
+       "#####+###;acac\n"
+       "#########;\n",
+       
+       // Level 1
+       "#########;\n"
+       "##-###-##;b,b\n"
+       "##     ##;\n"
+       "##     ##;\n"
+       "##     ##;\n"
+       "##     ##;\n"
+       "##     ##;\n"
+       "####+####;bb\n"
+       "#########;\n",
+       
+       // Level 2
+       "###########;\n"
+       "#####-#####;bbbbb\n"
+       "##       ##;\n"
+       "##      ###;\n"
+       "##  #    ##;\n"
+       "##       ##;\n"
+       "###+##+####;bbb,bb\n"
+       "###########;\n",
+       
+       // Level 3
+       "#############;\n"
+       "###-#####-###;a,aaa\n"
+       "##         ##;\n"
+       "##         ##;\n"
+       "##         ##;\n"
+       "##         ##;\n"
+       "##         ##;\n"
+       "##         ##;\n"
+       "######+######;aaaa\n"
+       "#############;\n",
+       
+       // Level 4
+       "#############;\n"
+       "###-#####-###;aaa,aa\n"
+       "##         ##;\n"
+       "##         ##;\n"
+       "##         ##;\n"
+       "##         ##;\n"
+       "##         ##;\n"
+       "##         ##;\n"
+       "###+#####+###;aa,aaa\n"
+       "#############;\n"
+};
+
+GLuint tex_tile_data;
+GLuint tex_tile_detail;
+GLuint tex_wood;
+GLuint tex_ball;
+
 m3x3f m_projection;
 m3x3f m_view;
 m3x3f m_mdl;
@@ -40,6 +191,32 @@ m3x3f m_mdl;
 #define FLAG_MERGER 0x40
 #define FLAG_DROP_R 0x80
 #define FLAG_FLIP_FLOP 0x100
+#define FLAG_FLIP_ROTATING 0x200
+
+/*
+       0000 0   | 0001 1   | 0010 2   | 0011 3
+                          |          |    |     |    |
+               X     |           X=    |    X     |    X=
+                          |          |          |     
+       0100 4   | 0101 5   | 0110 6   | 0111 7
+                          |          |    |     |    |
+         =X     |   =X=    |   =X     |   =X=
+                          |          |          |    
+       1000 8   | 1001 9   | 1010 10  | 1011 11
+                     |          |    |     |    |
+               X     |    X=    |    X     |    X=
+               |               |    |     |    |     |    |
+       1100 12  | 1101 13  | 1110 14  | 1111 15
+                     |          |    |     |    |
+         =X     |   =X=    |   =X     |   =X=
+               |          |    |     |    |     |    |
+*/
+
+enum cell_type
+{
+       k_cell_type_split = 7,
+       k_cell_type_merge = 13
+};
 
 v3f colour_sets[] =
 { { 0.9f, 0.2f, 0.01f },
@@ -62,6 +239,44 @@ static void colour_code_v3( char cc, v3f target )
        v3_copy( (v3f){0.0f,0.0f,0.0f}, target );
 }
 
+struct mesh
+{
+       GLuint vao, vbo;
+       u32 elements;
+};
+
+static void init_mesh( struct mesh *m, float *tris, u32 length )
+{
+       m->elements = length/3;
+       glGenVertexArrays( 1, &m->vao );
+       glGenBuffers( 1, &m->vbo );
+       
+       glBindVertexArray( m->vao );
+       glBindBuffer( GL_ARRAY_BUFFER, m->vbo );
+       glBufferData( GL_ARRAY_BUFFER, length*sizeof(float), tris, GL_STATIC_DRAW );
+       
+       glVertexAttribPointer( 0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), (void*)0 );
+       glEnableVertexAttribArray( 0 );
+       
+       VG_CHECK_GL();
+}
+
+static void free_mesh( struct mesh *m )
+{
+       glDeleteVertexArrays( 1, &m->vao );
+       glDeleteBuffers( 1, &m->vbo );
+}
+
+static void draw_mesh( int const start, int const count )
+{
+       glDrawArrays( GL_TRIANGLES, start*3, count*3 );
+}
+
+static void use_mesh( struct mesh *m )
+{
+       glBindVertexArray( m->vao );
+}
+
 struct world
 {
        struct cell
@@ -89,10 +304,7 @@ struct world
        
        u32 w, h;
        
-       GLuint tile_vao;
-       GLuint tile_vbo;
-       GLuint circle_vao;
-       GLuint circle_vbo;
+       struct mesh tile, circle;
        
        int selected;
        
@@ -249,21 +461,20 @@ static struct cell *pcell( v2i pos )
 
 int main( int argc, char *argv[] )
 {
-       vg_init( argc, argv, "FishLadder" );
+       vg_init( argc, argv, "Fish (Marbles Computer) Ladder Simulator 2022 | N,M: change level | SPACE: Test | LeftClick: Toggle tile" );
 }
 
 void vg_register(void)
 {
        SHADER_INIT( shader_tile_colour );
+       SHADER_INIT( shader_tile_main );
+       SHADER_INIT( shader_ball );
 }
 
 void vg_start(void)
 {
        // Quad mesh
        {
-               glGenVertexArrays( 1, &world.tile_vao );
-               glGenBuffers( 1, &world.tile_vbo );
-               
                float quad_mesh[] =
                {
                        0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
@@ -276,27 +487,11 @@ void vg_start(void)
                        0.75f, 0.375f, 0.25f, 0.5f, 0.75f, 0.625f
                };
                
-               glBindVertexArray( world.tile_vao );
-               glBindBuffer( GL_ARRAY_BUFFER, world.tile_vbo );
-               glBufferData
-               (
-                       GL_ARRAY_BUFFER,
-                       sizeof( quad_mesh ),
-                       quad_mesh,
-                       GL_STATIC_DRAW
-               );
-               
-               glVertexAttribPointer( 0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), (void*)0 );
-               glEnableVertexAttribArray( 0 );
-               
-               VG_CHECK_GL();
+               init_mesh( &world.tile, quad_mesh, vg_list_size(quad_mesh) );
        }
        
        // Circle mesh
        {
-               glGenVertexArrays( 1, &world.circle_vao );
-               glGenBuffers( 1, &world.circle_vbo );
-       
                float circle_mesh[32*6*3];
                int res = vg_list_size( circle_mesh ) / (6*3);
 
@@ -322,40 +517,46 @@ void vg_start(void)
                        v2_copy( v1, circle_mesh+i*6+2 );
                }
                
-               glBindVertexArray( world.circle_vao );
-               glBindBuffer( GL_ARRAY_BUFFER, world.circle_vbo );
-               glBufferData( GL_ARRAY_BUFFER, sizeof( circle_mesh ), circle_mesh, GL_STATIC_DRAW );
+               init_mesh( &world.circle, circle_mesh, vg_list_size( circle_mesh ) );
+       }
+       
+       // Textures
+       {
+               tex_tile_detail = vg_tex2d_rgba( "textures/tile_overlays.png" );
+               vg_tex2d_mipmap();
+               vg_tex2d_linear_mipmap();
+               vg_tex2d_repeat();
+               
+               tex_tile_data = vg_tex2d_rgba( "textures/tileset.png" );
+               vg_tex2d_mipmap();
+               vg_tex2d_linear_mipmap();
+               vg_tex2d_repeat();
                
-               glVertexAttribPointer( 0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), (void*)0 );
-               glEnableVertexAttribArray( 0 );
+               tex_wood = vg_tex2d_rgba( "textures/wood.png" );
+               vg_tex2d_mipmap();
+               vg_tex2d_linear_mipmap();
+               vg_tex2d_repeat();
                
-               VG_CHECK_GL();
+               tex_ball = vg_tex2d_rgba( "textures/ball_metallic.png" );
+               vg_tex2d_mipmap();
+               vg_tex2d_linear_mipmap();
+               vg_tex2d_clamp();
        }
        
-       map_load
-       ( 
-               "#############;\n"
-               "###-#####-###;aaa,aa\n"
-               "##         ##;\n"
-               "##         ##;\n"
-               "##         ##;\n"
-               "##         ##;\n"
-               "##         ##;\n"
-               "##         ##;\n"
-               "###+#####+###;aa,aaa\n"
-               "#############;\n"
-       );
+       map_load( level_pack[ 0 ] );
 }
 
 void vg_free(void)
 {
-       glDeleteVertexArrays( 1, &world.tile_vao );
-       glDeleteBuffers( 1, &world.tile_vbo );
-
-       glDeleteVertexArrays( 1, &world.circle_vao );
-       glDeleteBuffers( 1, &world.circle_vbo );
-
+       free_mesh( &world.tile );
+       free_mesh( &world.circle );
+       
        map_free();
+       
+       glDeleteTextures( 1, &tex_tile_data );
+       glDeleteTextures( 1, &tex_tile_detail );
+       glDeleteTextures( 1, &tex_wood );
+       glDeleteTextures( 1, &tex_ball );
 }
 
 static int cell_interactive( v2i co )
@@ -445,6 +646,27 @@ static int cell_interactive( v2i co )
 
 void vg_update(void)
 {
+       static int curlevel = 0;
+       int changelvl = curlevel;
+       if( vg_get_button_down( "prev" ) ) { if( curlevel > 0 ) changelvl --; }
+       else if( vg_get_button_down( "next" ) ) { if( curlevel < vg_list_size( level_pack )-1 ) changelvl ++; }
+       
+       if( changelvl != curlevel )
+       {
+               map_load( level_pack[ changelvl ] );
+               curlevel = changelvl;
+               
+               // TEMP!!! code dupe
+               world.simulating = 0;
+               world.num_fishes = 0;
+               world.sim_frame = 0;
+               
+               for( int i = 0; i < arrlen( world.io ); i ++ )
+                       world.io[i].recv_count = 0;
+               
+               vg_info( "Stopping simulation!\n" );
+       }
+       
        float ratio = (float)vg_window_y / (float)vg_window_x;
        float const size = 9.5f;
        
@@ -466,7 +688,7 @@ void vg_update(void)
        
        int tile_x = floorf( tile_pos[0] );
        int tile_y = floorf( tile_pos[1] );
-       
+
        // Tilemap editing
        if( !world.simulating )
        {
@@ -519,7 +741,6 @@ void vg_update(void)
        // Simulation stuff
        // ========================================================
        
-       // Reclassify world. TODO: Move into own function
        for( int y = 2; y < world.h-2; y ++ )
        {
                for( int x = 2; x < world.w-2; x ++ )
@@ -552,11 +773,13 @@ void vg_update(void)
                        
                        u8 config = pcell((v2i){x,y})->config;
                        
-                       if( config == 0x7 ) // splitter
+                       if( config == k_cell_type_split ) // splitter
                        {
-                               world.data[y*world.w+x ].state |= (FLAG_SPLIT | FLAG_DROP_L | FLAG_DROP_R);
+                               struct cell *cell = pcell((v2i){x,y});
+                       
+                               cell->state |= (FLAG_SPLIT | FLAG_DROP_L | FLAG_DROP_R);
                        }
-                       else if( config == 0xD )
+                       else if( config == k_cell_type_merge )
                        {
                                world.data[y*world.w+x-1].state |= FLAG_DROP_R;
                                world.data[y*world.w+x+1].state |= FLAG_DROP_L;
@@ -592,8 +815,6 @@ void vg_update(void)
                                                
                                                v2i dirs[] = {{1,0},{-1,0},{0,-1}};
                                                for( int j = 0; j < vg_list_size(dirs); j ++ )
-                                               {
-                                                       v2i target;
                                                        if( pcell( (v2i){ posx+dirs[j][0], posy+dirs[j][1] } )->state & FLAG_CANAL )
                                                        {
                                                                fish->dir[0] = dirs[j][0];
@@ -601,13 +822,22 @@ void vg_update(void)
                                                                can_spawn = 1;
                                                                break;
                                                        }
-                                               }
                                                
                                                if( !can_spawn )
                                                        world.num_fishes--;
                                        }
                                }
                        }
+                       
+                       // Update splitter deltas
+                       for( int i = 0; i < world.h*world.w; i ++ )
+                       {
+                               struct cell *cell = &world.data[i];
+                               if( cell->config == k_cell_type_split )
+                               {
+                                       cell->state &= ~FLAG_FLIP_ROTATING;
+                               }
+                       }
 
                        for( int i = 0; i < world.num_fishes; i ++ )
                        {
@@ -658,7 +888,7 @@ void vg_update(void)
                                        else
                                        {
                                                struct cell *cell_next = pcell( (v2i){ fish->pos[0]+fish->dir[0], fish->pos[1]+fish->dir[1] } );
-                                               if( !(cell_next->state & FLAG_CANAL) )
+                                               if( !(cell_next->state & (FLAG_CANAL|FLAG_OUTPUT)) )
                                                {
                                                        // Try other directions for valid, so down, left, right..
                                                        v2i dirs[] = {{1,0},{-1,0},{0,-1}};
@@ -669,7 +899,7 @@ void vg_update(void)
                                                                if( (dirs[j][0] == -fish->dir[0]) && (dirs[j][1] == -fish->dir[1]) )
                                                                        continue;
                                                        
-                                                               if( pcell( (v2i){ fish->pos[0]+dirs[j][0], fish->pos[1]+dirs[j][1] } )->state & FLAG_CANAL )
+                                                               if( pcell( (v2i){ fish->pos[0]+dirs[j][0], fish->pos[1]+dirs[j][1] } )->state & (FLAG_CANAL|FLAG_OUTPUT) )
                                                                {
                                                                        fish->dir[0] = dirs[j][0];
                                                                        fish->dir[1] = dirs[j][1];
@@ -680,6 +910,11 @@ void vg_update(void)
                                        
                                        fish->pos[0] += fish->dir[0];
                                        fish->pos[1] += fish->dir[1];
+                                       
+                                       struct cell *cell_entry = pcell( fish->pos );
+                                       
+                                       if( cell_entry->config == k_cell_type_split )
+                                               cell_entry->state |= FLAG_FLIP_ROTATING;
                                }
                        }
                        
@@ -696,70 +931,203 @@ void vg_render(void)
        glClearColor( 0.8f, 0.8f, 0.8f, 1.0f );
        glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
        
-       glBindVertexArray( world.tile_vao );
-       SHADER_USE( shader_tile_colour );
-       glUniformMatrix3fv( SHADER_UNIFORM( shader_tile_colour, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
+       float scaled_time = 0.0f, frame_lerp = 0.0f;
+       
+       if( world.simulating )
+       {
+               scaled_time = (vg_time-world.sim_start)*2.0f;
+               frame_lerp = scaled_time - (float)world.sim_frame;
+       }
+       
+       v2f const curve_3[] = {{0.5f,1.0f},{0.5f,0.625f},{0.625f,0.5f},{1.0f,0.5f}};
+       v2f const curve_6[] = {{0.5f,1.0f},{0.5f,0.625f},{0.375f,0.5f},{0.0f,0.5f}};
+       v2f const curve_9[] = {{1.0f,0.5f},{0.625f,0.5f},{0.5f,0.375f},{0.5f,0.0f}};
+       v2f const curve_12[]= {{0.0f,0.5f},{0.375f,0.5f},{0.5f,0.375f},{0.5f,0.0f}};
+       
+       v2f const curve_7[] = {{0.5f,0.8438f},{0.875f,0.8438f},{0.625f,0.5f},{1.0f,0.5f}};
+       v2f const curve_7_1[] = {{0.5f,0.8438f},{1.0f-0.875f,0.8438f},{1.0-0.625f,0.5f},{0.0f,0.5f}};
+       
+       float const curve_7_linear_section = 0.1562f;
+       
+       // TILE SET RENDERING
+       // ======================================================================
+       use_mesh( &world.tile );
+       SHADER_USE( shader_tile_main );
+
+       m2x2f subtransform;
+       m2x2_identity( subtransform );
+       glUniformMatrix2fv( SHADER_UNIFORM( shader_tile_main, "uSubTransform" ), 1, GL_FALSE, (float *)subtransform );  
+       glUniformMatrix3fv( SHADER_UNIFORM( shader_tile_main, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
+       
+       // Bind textures
+       glActiveTexture( GL_TEXTURE0 );
+       glBindTexture( GL_TEXTURE_2D, tex_tile_data );
+       glUniform1i( SHADER_UNIFORM( shader_tile_main, "uTexGlyphs" ), 0 );
+       
+       glActiveTexture( GL_TEXTURE1 );
+       glBindTexture( GL_TEXTURE_2D, tex_wood );
+       glUniform1i( SHADER_UNIFORM( shader_tile_main, "uTexWood" ), 1 );
        
-       // Shadow layer
-       glUniform4f( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 0.5f, 0.5f, 0.5f, 1.0f );
        for( int y = 0; y < world.h; y ++ )
+       {
                for( int x = 0; x < world.w; x ++ )
-               {                       
+               {
                        struct cell *cell = pcell((v2i){x,y});
+                       int selected = world.selected == y*world.w + x;
+                       
+                       int tile_offsets[][2] =
+                       {
+                               {2, 0}, {0, 3}, {0, 2}, {2, 2},
+                               {1, 0}, {2, 3}, {3, 2}, {1, 3},
+                               {3, 1}, {0, 1}, {1, 2}, {2, 1},
+                               {1, 1}, {3, 3}, {2, 1}, {2, 1}
+                       };
+                       
+                       int uv[2] = { 3, 0 };
                        
                        if( cell->state & FLAG_CANAL )
                        {
-                               continue;
+                               uv[0] = tile_offsets[ cell->config ][0];
+                               uv[1] = tile_offsets[ cell->config ][1];
                        }
                        
-                       glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), (float)x - 0.2f, (float)y - 0.15f, 1.0f );
-                       glDrawArrays( GL_TRIANGLES, 0, 6 );
+                       glUniform4f( SHADER_UNIFORM( shader_tile_main, "uOffset" ), (float)x, (float)y, uv[0], uv[1] );
+                       draw_mesh( 0, 2 );
                }
+       }
+
+       //      Draw splitters
+       glEnable(GL_BLEND);
+       glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+       glBlendEquation(GL_FUNC_ADD);
        
        for( int y = 0; y < world.h; y ++ )
        {
                for( int x = 0; x < world.w; x ++ )
                {
                        struct cell *cell = pcell((v2i){x,y});
-                       int selected = world.selected == y*world.w + x;
-               
-                       if( cell->state & FLAG_CANAL && !selected )
-                               continue;
-               
-                       glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), (float)x, (float)y, 1.0f );
                        
-                       v4f colour;
+                       if( cell->state & FLAG_SPLIT )
+                       {
+                               float rotation = cell->state & FLAG_FLIP_FLOP? vg_rad( -45.0f ): vg_rad( 45.0f );
                                
-                       if( cell->state & FLAG_WALL ) { v4_copy( (v4f){ 0.2f, 0.2f, 0.2f, 1.0f }, colour ); }
-                       else if( cell->state & FLAG_CANAL ) { v4_copy( (v4f){ 0.6f, 0.6f, 0.6f, 1.0f }, colour ); }
-                       else if( cell->state & FLAG_INPUT ) { v4_copy( (v4f){ 0.5f, 0.5f, 0.5f, 1.0f }, colour ); }
-                       else if( cell->state & FLAG_OUTPUT ) { v4_copy( (v4f){ 0.2f, 0.7f, 0.3f, 1.0f }, colour ); }
-                       else v4_copy( (v4f){ 0.9f, 0.9f, 0.9f, 1.0f }, colour );
-                       
-                       //if( cell->water[world.frame&0x1] )
-                       //      v4_copy( (v4f){ 0.2f, 0.3f, 0.7f * (float)(cell->water[world.frame&0x1]) * (1.0f/16.0f), 1.0f }, colour );
+                               if( cell->state & FLAG_FLIP_ROTATING )
+                               {
+                                       if( (frame_lerp > curve_7_linear_section) )
+                                       {
+                                               float const rotation_speed = 0.4f;
+                                               if( (frame_lerp < 1.0f-rotation_speed) )
+                                               {
+                                                       float t = frame_lerp - curve_7_linear_section;
+                                                       t *= -2.0f * (1.0f/(1.0f-(curve_7_linear_section+rotation_speed)));
+                                                       t += 1.0f;
+                                                       
+                                                       rotation *= t;
+                                               }
+                                               else
+                                                       rotation *= -1.0f;
+                                       }
+                               }
+
+                               m2x2_create_rotation( subtransform, rotation );
+
+                               glUniformMatrix2fv( SHADER_UNIFORM( shader_tile_main, "uSubTransform" ), 1, GL_FALSE, (float *)subtransform );  
+                               glUniform4f( SHADER_UNIFORM( shader_tile_main, "uOffset" ), (float)x, (float)y + 0.125f, 0.0f, 0.0f );
+                               draw_mesh( 0, 2 );
+                       }
+               }
+       }
+       
+       //glDisable(GL_BLEND);
+       
+       SHADER_USE( shader_ball );
+       glUniformMatrix3fv( SHADER_UNIFORM( shader_ball, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
+       
+       glActiveTexture( GL_TEXTURE0 );
+       glBindTexture( GL_TEXTURE_2D, tex_ball );
+       glUniform1i( SHADER_UNIFORM( shader_ball, "uTexMain" ), 0 );
+       
+       // Draw 'fish'
+       if( world.simulating )
+       {
+               for( int i = 0; i < world.num_fishes; i ++ )
+               {
+                       struct fish *fish = &world.fishes[i];
                        
-                       if( selected )
-                               v3_muls( colour, sinf( vg_time )*0.25f + 0.5f, colour );
+                       if( !fish->alive )
+                               continue;
+
+                       // Evaluate position
+                       struct cell *cell = pcell(fish->pos);
+                       v2f fish_pos;
                        
-                       //if( cell->state & (FLAG_SPLIT) )
-                       //      v4_copy( (v4f){ 0.75f, 0.75f, 0.02f, 1.0f }, colour );
-                       //if( cell->state & (FLAG_MERGER) )
-                       //      v4_copy( (v4f){ 0.75f, 0.02f, 0.75f, 1.0f }, colour );
+                       v2f const *curve;
                        
-                       glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1, colour );
+                       float t = frame_lerp;
                        
-                       glDrawArrays( GL_TRIANGLES, 0, 6 );
+                       switch( cell->config )
+                       {
+                               case 13:
+                                       if( fish->dir[0] == 1 )
+                                               curve = curve_12;
+                                       else
+                                               curve = curve_9;
+                               break;
+                               case 3: curve = curve_3; break;
+                               case 6: curve = curve_6; break;
+                               case 9: curve = curve_9; break;
+                               case 12: curve = curve_12; break;
+                               case 7:
+                                       if( t > curve_7_linear_section )
+                                       {
+                                               t -= curve_7_linear_section;
+                                               t *= (1.0f/(1.0f-curve_7_linear_section));
+                                               
+                                               curve = cell->state & FLAG_FLIP_FLOP? curve_7: curve_7_1;
+                                       }
+                                       else curve = NULL;
+                               break;
+                               default: curve = NULL; break;
+                       }
                        
-                       if( cell->state & FLAG_CANAL )
+                       if( curve )
+                       {
+                               float t2 = t * t;
+                               float t3 = t * t * t;
+
+                               float cA = 3.0f*t2 - 3.0f*t3;
+                               float cB = 3.0f*t3 - 6.0f*t2 + 3.0f*t;
+                               float cC = 3.0f*t2 - t3 - 3.0f*t + 1.0f;
+
+                               fish_pos[0] = t3*curve[3][0] + cA*curve[2][0] + cB*curve[1][0] + cC*curve[0][0];
+                               fish_pos[1] = t3*curve[3][1] + cA*curve[2][1] + cB*curve[1][1] + cC*curve[0][1];
+                               fish_pos[0] += (float)fish->pos[0];
+                               fish_pos[1] += (float)fish->pos[1];
+                       }
+                       else
                        {
-                               glUniform4f( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1.0f, 1.0f, 1.0f, 1.0f );
-                               glDrawArrays( GL_TRIANGLES, 6, 3 );
+                               v2f origin;
+                               origin[0] = (float)fish->pos[0] + (float)fish->dir[0]*-0.5f + 0.5f;
+                               origin[1] = (float)fish->pos[1] + (float)fish->dir[1]*-0.5f + 0.5f;
+                               
+                               fish_pos[0] = origin[0] + (float)fish->dir[0]*t;
+                               fish_pos[1] = origin[1] + (float)fish->dir[1]*t;
                        }
+                       
+                       v4f dot_colour = { 0.0f, 0.0f, 0.0f, 1.0f };
+                       colour_code_v3( fish->payload, dot_colour );
+                       
+                       glUniform3fv( SHADER_UNIFORM( shader_ball, "uColour" ), 1, dot_colour );
+                       glUniform2f( SHADER_UNIFORM( shader_ball, "uOffset" ), fish_pos[0], fish_pos[1] );
+                       draw_mesh( 0, 32 );
                }
        }
        
-       glBindVertexArray( world.circle_vao );
+       glDisable(GL_BLEND);
+
+       SHADER_USE( shader_tile_colour );
+       glUniformMatrix3fv( SHADER_UNIFORM( shader_tile_colour, "uPv" ), 1, GL_FALSE, (float *)vg_pv );
+       use_mesh( &world.circle );
        
        // Draw i/o arrays
        for( int i = 0; i < arrlen( world.io ); i ++ )
@@ -770,9 +1138,9 @@ void vg_render(void)
                int is_input = world.data[ term->id ].state & FLAG_INPUT;
                
                int const filled_start = 0;
-               int const filled_count = 32*3;
-               int const empty_start = 32*3;
-               int const empty_count = 32*6;
+               int const filled_count = 32;
+               int const empty_start = 32;
+               int const empty_count = 32*2;
                
                v4f dot_colour = { 0.0f, 0.0f, 0.0f, 1.0f };
                
@@ -787,9 +1155,9 @@ void vg_render(void)
                        
                                // Draw filled if tick not passed, draw empty if empty
                                if( world.sim_frame > j )
-                                       glDrawArrays( GL_TRIANGLES, empty_start, empty_count );
+                                       draw_mesh( empty_start, empty_count );
                                else
-                                       glDrawArrays( GL_TRIANGLES, filled_start, filled_count );
+                                       draw_mesh( filled_start, filled_count );
                        }
                        else
                        {
@@ -799,39 +1167,26 @@ void vg_render(void)
                                        v3_muls( dot_colour, 0.8f, dot_colour );
                                        glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1, dot_colour );
                                        
-                                       glDrawArrays( GL_TRIANGLES, filled_start, filled_count );
+                                       draw_mesh( filled_start, filled_count );
                                }
                                
                                colour_code_v3( term->conditions[j], dot_colour );
                                glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1, dot_colour );
                                
-                               glDrawArrays( GL_TRIANGLES, empty_start, empty_count );
+                               draw_mesh( empty_start, empty_count );
                        }
                }
        }
        
-       // Draw 'fish'
        if( world.simulating )
        {
-               float scaled_time = (vg_time-world.sim_start)*2.0f;
-               float lerp = 1.0f-(scaled_time - (float)world.sim_frame);
-               
-               v4f dot_colour = { 0.0f, 0.0f, 0.0f, 1.0f };
-               
-               for( int i = 0; i < world.num_fishes; i ++ )
-               {
-                       struct fish *fish = &world.fishes[i];
-                       
-                       if( !fish->alive )
-                               continue;
-                       
-                       colour_code_v3( fish->payload, dot_colour );
-                       glUniform4fv( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 1, dot_colour );
-                       
-                       glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), (float)fish->pos[0] + 0.5f - (float)fish->dir[0]*lerp, (float)fish->pos[1] + 0.25f - (float)fish->dir[1]*lerp, 0.25f );
-                       glDrawArrays( GL_TRIANGLES, 0, 32*3 );
-               }
+               glUniform4f( SHADER_UNIFORM( shader_tile_colour, "uColour" ), 0.0f, 0.0f, 0.0f, 1.0f );
+               glUniform3f( SHADER_UNIFORM( shader_tile_colour, "uOffset" ), -0.5f + cosf( vg_time * 4.0f ) * 0.2f, sinf( vg_time * 4.0f ) * 0.2f + (float)world.h * 0.5f, 0.05f );
+               draw_mesh( 0, 32 );
        }
 }
 
-void vg_ui(void){}
+void vg_ui(void)
+{
+       //ui_test();
+}