+ fprintf( stream, "%d", cell->links[0]? -cell->links[0]: cell->links[1] );
+ }
+ }
+
+ fputc( '\n', stream );
+ }
+}
+
+int main( int argc, char *argv[] )
+{
+ vg_init( argc, argv, "Marble Computing | SPACE: Test | LeftClick: Toggle tile | RightClick: Drag wire" );
+ return 0;
+}
+
+static int console_credits( int argc, char const *argv[] )
+{
+ vg_info( "Aknowledgements:\n" );
+ vg_info( " GLFW zlib/libpng glfw.org\n" );
+ vg_info( " miniaudio MIT0 miniaud.io\n" );
+ vg_info( " QOI MIT phoboslab.org\n" );
+ vg_info( " STB library MIT nothings.org\n" );
+ vg_info( " Weiholmir font justfredrik.itch.io\n" );
+ return 0;
+}
+
+static int console_save_map( int argc, char const *argv[] )
+{
+ if( !world.initialzed )
+ {
+ vg_error( "Tried to save uninitialized map!\n" );
+ return 0;
+ }
+
+ char map_path[ 256 ];
+
+ strcpy( map_path, "sav/" );
+ strcat( map_path, world.map_name );
+ strcat( map_path, ".map" );
+
+ FILE *test_writer = fopen( map_path, "wb" );
+ if( test_writer )
+ {
+ vg_info( "Saving map to '%s'\n", map_path );
+ map_serialize( test_writer );
+
+ fclose( test_writer );
+ return 1;
+ }
+ else
+ {
+ vg_error( "Unable to open stream for writing\n" );
+ return 0;
+ }
+}
+
+static int console_load_map( int argc, char const *argv[] )
+{
+ char map_path[ 256 ];
+
+ if( argc >= 1 )
+ {
+ // try from saves
+ strcpy( map_path, "sav/" );
+ strcat( map_path, argv[0] );
+ strcat( map_path, ".map" );
+
+ char *text_source = vg_textasset_read( map_path );
+
+ if( !text_source )
+ {
+ strcpy( map_path, "maps/" );
+ strcat( map_path, argv[0] );
+ strcat( map_path, ".map" );
+
+ text_source = vg_textasset_read( map_path );
+ }
+
+ if( text_source )
+ {
+ vg_info( "Loading map: '%s'\n", map_path );
+ world.ptr_career_level = NULL;
+
+ if( !map_load( text_source, argv[0] ) )
+ {
+ free( text_source );
+ return 0;
+ }
+
+ free( text_source );
+
+ for( int i = 0; i < vg_list_size( level_pack_1 ); i ++ )
+ {
+ if( !strcmp( level_pack_1[i], argv[0] ) )
+ {
+ world.ptr_career_level = career.levels + i;
+ break;
+ }
+ }
+
+ return 1;
+ }
+ else
+ {
+ vg_error( "Missing maps '%s'\n", argv[0] );
+ return 0;
+ }
+ }
+ else
+ {
+ vg_error( "Missing argument <map_path>\n" );
+ return 0;
+ }
+}
+
+static void simulation_stop(void)
+{
+ world.simulating = 0;
+ world.num_fishes = 0;
+ world.sim_frame = 0;
+ world.sim_run = 0;
+
+ io_reset();
+
+ sfx_system_fadeout( &audio_system_balls_rolling, 44100 );
+
+ vg_info( "Stopping simulation!\n" );
+}
+
+static int console_changelevel( int argc, char const *argv[] )
+{
+ if( argc >= 1 )
+ {
+ // Save current level
+ console_save_map( 0, NULL );
+ if( console_load_map( argc, argv ) )
+ {
+ simulation_stop();
+ return 1;
+ }
+ }
+ else
+ {
+ vg_error( "Missing argument <map_path>\n" );
+ }
+
+ return 0;
+}
+
+void vg_start(void)
+{
+ vg_function_push( (struct vg_cmd){
+ .name = "_map_write",
+ .function = console_save_map
+ });
+
+ vg_function_push( (struct vg_cmd){
+ .name = "_map_load",
+ .function = console_load_map
+ });
+
+ vg_function_push( (struct vg_cmd){
+ .name = "map",
+ .function = console_changelevel
+ });
+
+ vg_function_push( (struct vg_cmd){
+ .name = "credits",
+ .function = console_credits
+ });
+
+ // Quad mesh
+ {
+ float quad_mesh[] =
+ {
+ 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f,
+ 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f,
+
+ 0.0f, 0.0f, 0.0f, 1.0f, 4.0f, 1.0f,
+ 0.0f, 0.0f, 4.0f, 1.0f, 4.0f, 0.0f
+ };
+
+ init_mesh( &world.tile, quad_mesh, vg_list_size(quad_mesh) );
+ }
+
+ // Circle mesh
+ {
+ float circle_mesh[32*6*3];
+ int res = vg_list_size( circle_mesh ) / (6*3);
+
+ for( int i = 0; i < res; i ++ )
+ {
+ v2f v0 = { sinf( ((float)i/(float)res)*VG_TAUf ), cosf( ((float)i/(float)res)*VG_TAUf ) };
+ v2f v1 = { sinf( ((float)(i+1)/(float)res)*VG_TAUf ), cosf( ((float)(i+1)/(float)res)*VG_TAUf ) };
+
+ circle_mesh[ i*6+0 ] = 0.0f;
+ circle_mesh[ i*6+1 ] = 0.0f;
+
+ v2_copy( v0, circle_mesh + 32*6 + i*12 );
+ v2_muls( v0, 0.8f, circle_mesh + 32*6 + i*12+2 );
+ v2_copy( v1, circle_mesh + 32*6 + i*12+4 );
+
+ v2_copy( v1, circle_mesh + 32*6 + i*12+6 );
+ v2_muls( v1, 0.8f, circle_mesh + 32*6 + i*12+8 );
+ v2_muls( v0, 0.8f, circle_mesh + 32*6 + i*12+10 );
+
+ v2_copy( v0, circle_mesh + i*6+4 );
+ v2_copy( v1, circle_mesh + i*6+2 );
+ v2_copy( v0, circle_mesh+i*6+4 );
+ v2_copy( v1, circle_mesh+i*6+2 );
+ }
+
+ init_mesh( &world.circle, circle_mesh, vg_list_size( circle_mesh ) );
+ }
+
+ // Numbers mesh
+ {
+ init_mesh( &world.numbers,
+ MESH_NUMBERS_BUFFER,
+ vg_list_size( MESH_NUMBERS_BUFFER )
+ );
+
+ for( int i = 0; i < 10; i ++ )
+ {
+ vg_info( "offset: %u, length: %u\n", MESH_NUMBERS_OFFSETS[i][0], MESH_NUMBERS_OFFSETS[i][1] );
+ }
+ }
+
+ // Create wire mesh
+ {
+ int const num_segments = 64;
+
+ struct mesh_wire *mw = &world.wire;
+
+ v2f wire_points[ num_segments * 2 ];
+ u16 wire_indices[ 6*(num_segments-1) ];
+
+ for( int i = 0; i < num_segments; i ++ )
+ {
+ float l = (float)i / (float)(num_segments-1);
+
+ v2_copy( (v2f){ l, -0.5f }, wire_points[i*2+0] );
+ v2_copy( (v2f){ l, 0.5f }, wire_points[i*2+1] );
+
+ if( i < num_segments-1 )
+ {
+ wire_indices[ i*6+0 ] = i*2 + 0;
+ wire_indices[ i*6+1 ] = i*2 + 1;
+ wire_indices[ i*6+2 ] = i*2 + 3;
+ wire_indices[ i*6+3 ] = i*2 + 0;
+ wire_indices[ i*6+4 ] = i*2 + 3;
+ wire_indices[ i*6+5 ] = i*2 + 2;
+ }
+ }
+
+ glGenVertexArrays( 1, &mw->vao );
+ glGenBuffers( 1, &mw->vbo );
+ glGenBuffers( 1, &mw->ebo );
+ glBindVertexArray( mw->vao );
+
+ glBindBuffer( GL_ARRAY_BUFFER, mw->vbo );
+
+ glBufferData( GL_ARRAY_BUFFER, sizeof( wire_points ), wire_points, GL_STATIC_DRAW );
+ glBindVertexArray( mw->vao );
+
+ glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, mw->ebo );
+ glBufferData( GL_ELEMENT_ARRAY_BUFFER, sizeof( wire_indices ), wire_indices, GL_STATIC_DRAW );
+
+ // XY
+ glVertexAttribPointer( 0, 2, GL_FLOAT, GL_FALSE, 2*sizeof(float), (void*)0 );
+ glEnableVertexAttribArray( 0 );
+
+ VG_CHECK_GL();
+
+ mw->em = vg_list_size( wire_indices );
+ }
+
+ // Create info data texture
+ {
+ glGenTextures( 1, &world.background_data );
+ glBindTexture( GL_TEXTURE_2D, world.background_data );
+ glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, 64, 64, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL );
+ vg_tex2d_nearest();
+ }
+
+ // Create random smaples texture
+ {
+ u8 *data = malloc(512*512*2);
+ for( int i = 0; i < 512*512*2; i ++ )
+ data[ i ] = rand()/(RAND_MAX/255);
+
+ glGenTextures( 1, &world.random_samples );
+ glBindTexture( GL_TEXTURE_2D, world.random_samples );
+ glTexImage2D( GL_TEXTURE_2D, 0, GL_RG, 512, 512, 0, GL_RG, GL_UNSIGNED_BYTE, data );
+ vg_tex2d_linear();
+ vg_tex2d_repeat();
+
+ free( data );
+ }
+
+ resource_load_main();
+
+ // Restore gamestate
+ career_load();
+ console_load_map( 1, level_pack_1 );
+}
+
+void vg_free(void)
+{
+ console_save_map( 0, NULL );
+ career_serialize();
+
+ resource_free_main();
+
+ glDeleteTextures( 1, &world.background_data );
+ glDeleteTextures( 1, &world.random_samples );
+
+ glDeleteVertexArrays( 1, &world.wire.vao );
+ glDeleteBuffers( 1, &world.wire.vbo );
+ glDeleteBuffers( 1, &world.wire.ebo );
+
+ free_mesh( &world.tile );
+ free_mesh( &world.circle );
+ free_mesh( &world.numbers );
+
+ map_free();
+}
+
+static int world_check_pos_ok( v2i co )
+{
+ return (co[0] < 2 || co[0] >= world.w-2 || co[1] < 2 || co[1] >= world.h-2)? 0: 1;
+}
+
+static int cell_interactive( v2i co )
+{
+ // Bounds check
+ if( !world_check_pos_ok( co ) )
+ return 0;
+
+ // Flags check
+ if( world.data[ world.w*co[1] + co[0] ].state & (FLAG_WALL|FLAG_INPUT|FLAG_OUTPUT) )
+ return 0;
+
+ // List of 3x3 configurations that we do not allow
+ static u32 invalid_src[][9] =
+ {
+ { 0,1,0,
+ 1,1,1,
+ 0,1,0
+ },
+ { 0,0,0,
+ 0,1,1,
+ 0,1,1
+ },
+ { 0,0,0,
+ 1,1,0,
+ 1,1,0
+ },
+ { 0,1,1,
+ 0,1,1,
+ 0,0,0
+ },
+ { 1,1,0,
+ 1,1,0,
+ 0,0,0
+ },
+ { 0,1,0,
+ 0,1,1,
+ 0,1,0
+ },
+ { 0,1,0,
+ 1,1,0,
+ 0,1,0
+ }
+ };
+
+ // Statically compile invalid configurations into bitmasks
+ static u32 invalid[ vg_list_size(invalid_src) ];
+
+ for( int i = 0; i < vg_list_size(invalid_src); i ++ )
+ {
+ u32 comped = 0x00;
+
+ for( int j = 0; j < 3; j ++ )
+ for( int k = 0; k < 3; k ++ )
+ comped |= invalid_src[i][ j*3+k ] << ((j*5)+k);
+
+ invalid[i] = comped;
+ }
+
+ // Extract 5x5 grid surrounding tile
+ u32 blob = 0x1000;
+ for( int y = co[1]-2; y < co[1]+3; y ++ )
+ for( int x = co[0]-2; x < co[0]+3; x ++ )
+ {
+ struct cell *cell = pcell((v2i){x,y});
+
+ if( cell && (cell->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT)) )
+ blob |= 0x1 << ((y-(co[1]-2))*5 + x-(co[0]-2));
+ }
+
+ // Run filter over center 3x3 grid to check for invalid configurations
+ int kernel[] = { 0, 1, 2, 5, 6, 7, 10, 11, 12 };
+ for( int i = 0; i < vg_list_size(kernel); i ++ )
+ {
+ if( blob & (0x1 << (6+kernel[i])) )
+ {
+ u32 window = blob >> kernel[i];
+
+ for( int j = 0; j < vg_list_size(invalid); j ++ )
+ if((window & invalid[j]) == invalid[j])
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
+static void map_reclassify( v2i start, v2i end, int update_texbuffer )
+{
+ v2i full_start = { 1,1 };
+ v2i full_end = { world.w-1, world.h-1 };
+
+ if( !start || !end )
+ {
+ start = full_start;
+ end = full_end;
+ }
+
+ // Texture data
+ u8 info_buffer[64*64*4];
+ u32 pixel_id = 0;
+
+ int px0 = vg_max( start[0], full_start[0] ),
+ px1 = vg_min( end[0], full_end[0] ),
+ py0 = vg_max( start[1], full_start[1] ),
+ py1 = vg_min( end[1], full_end[1] );
+
+ for( int y = py0; y < py1; y ++ )
+ {
+ for( int x = px0; x < px1; x ++ )
+ {
+ struct cell *cell = pcell((v2i){x,y});
+
+ v2i dirs[] = {{1,0},{0,1},{-1,0},{0,-1}};
+
+ u8 height = 0;
+ u8 config = 0x00;
+
+ if( cell->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT) )
+ {
+ for( int i = 0; i < vg_list_size( dirs ); i ++ )
+ {
+ struct cell *neighbour = pcell((v2i){x+dirs[i][0], y+dirs[i][1]});
+ if( neighbour->state & (FLAG_CANAL|FLAG_INPUT|FLAG_OUTPUT) )
+ config |= 0x1 << i;
+ }
+
+ height = 128;
+ }
+ else
+ {
+ if( cell->state & FLAG_WALL )
+ height = 255;
+
+ config = 0xF;
+ }
+
+ pcell((v2i){x,y})->config = config;
+
+ u8 *info_px = &info_buffer[ (pixel_id ++)*4 ];
+ info_px[0] = height;
+ info_px[1] = cell->state & FLAG_WALL? 0: 255;
+ info_px[2] = 0;
+ info_px[3] = 0;
+
+ if(
+ (
+ ((cell->state & FLAG_IS_TRIGGER) && (cell->config == 0xF || cell->config == k_cell_type_split)) ||
+ ((cell->state & FLAG_TARGETED) && (cell->config != k_cell_type_split))
+ ) && update_texbuffer
+ ){
+ cell->state &= ~(FLAG_TARGETED|FLAG_IS_TRIGGER);
+ for( u32 i = 0; i < 2; i ++ )
+ {
+ if( cell->links[i] )
+ {
+ struct cell *other_ptr = &world.data[ cell->links[i] ];
+ other_ptr->links[ i ] = 0;
+ other_ptr->state &= ~FLAG_IS_TRIGGER;
+
+ if( other_ptr->links[ i ^ 0x1 ] == 0 )
+ other_ptr->state &= ~FLAG_TARGETED;
+ }
+ }
+
+ cell->links[0] = 0;
+ cell->links[1] = 0;
+ }
+ }
+ }
+
+ if( update_texbuffer )
+ {
+ glBindTexture( GL_TEXTURE_2D, world.background_data );
+ glTexSubImage2D( GL_TEXTURE_2D, 0, px0 + 16, py0 + 16, px1-px0, py1-py0, GL_RGBA, GL_UNSIGNED_BYTE, info_buffer );
+ }
+}
+
+u16 id_drag_from = 0;
+v2f drag_from_co;
+v2f drag_to_co;
+
+void vg_update(void)
+{
+ // Fit within screen
+
+ float r1 = (float)vg_window_y / (float)vg_window_x,
+ r2 = (float)world.h / (float)world.w,
+ size;
+
+ size = ( r2 < r1? (float)world.w * 0.5f: ((float)world.h * 0.5f) / r1 ) + 2.5f;
+ m3x3_projection( m_projection, -size, size, -size*r1, size*r1 );
+
+ v3f origin;
+ origin[0] = floorf( -0.5f * world.w );
+ origin[1] = floorf( -0.5f * world.h );
+ origin[2] = 0.0f;
+
+ m3x3_identity( m_view );
+ m3x3_translate( m_view, origin );
+ m3x3_mul( m_projection, m_view, vg_pv );
+ vg_projection_update();
+
+ // Input stuff
+ v2_copy( vg_mouse_ws, world.tile_pos );
+
+ world.tile_x = floorf( world.tile_pos[0] );
+ world.tile_y = floorf( world.tile_pos[1] );
+
+ // Tilemap editing
+ if( !world.simulating && !gui_want_mouse() )
+ {
+ v2_copy( vg_mouse_ws, drag_to_co );
+
+ if( cell_interactive( (v2i){ world.tile_x, world.tile_y } ))
+ {
+ world.selected = world.tile_y * world.w + world.tile_x;
+
+ static u32 modify_state = 0;
+
+ struct cell *cell_ptr = &world.data[world.selected];
+
+ if( vg_get_button_down("primary") )
+ {
+ modify_state = (cell_ptr->state & FLAG_CANAL) ^ FLAG_CANAL;
+ }
+
+ if( vg_get_button("primary") && ((cell_ptr->state & FLAG_CANAL) != modify_state) )
+ {
+ cell_ptr->state &= ~FLAG_CANAL;
+ cell_ptr->state |= modify_state;
+
+ if( cell_ptr->state & FLAG_CANAL )
+ {
+ cell_ptr->links[0] = 0;
+ cell_ptr->links[1] = 0;
+
+ sfx_set_playrnd( &audio_tile_mod, &audio_system_sfx, 3, 6 );
+ world.score ++;
+ }
+ else
+ {
+ sfx_set_playrnd( &audio_tile_mod, &audio_system_sfx, 0, 3 );
+ world.score --;
+ }
+
+ map_reclassify( (v2i){ world.tile_x -2, world.tile_y -2 },
+ (v2i){ world.tile_x +2, world.tile_y +2 }, 1 );
+ }
+
+ if( vg_get_button_down("secondary") && !(cell_ptr->config == k_cell_type_split) )
+ {
+ id_drag_from = world.selected;
+ drag_from_co[0] = world.tile_x + 0.5f;
+ drag_from_co[1] = world.tile_y + 0.5f;
+ }
+
+ if( id_drag_from && (cell_ptr->config == k_cell_type_split) )
+ {
+ float local_x = vg_mouse_ws[0] - (float)world.tile_x;
+ drag_to_co[0] = (float)world.tile_x + (local_x > 0.5f? 0.75f: 0.25f);
+ drag_to_co[1] = (float)world.tile_y + 0.25f;
+
+ if( vg_get_button_up("secondary") )
+ {
+ struct cell *drag_ptr = &world.data[id_drag_from];
+ u32 link_id = local_x > 0.5f? 1: 0;
+
+ // Cleanup existing connections
+ if( cell_ptr->links[ link_id ] )
+ {
+ vg_warn( "Destroying existing connection on link %u (%hu)\n", link_id, cell_ptr->links[ link_id ] );
+
+ struct cell *current_connection = &world.data[ cell_ptr->links[ link_id ]];
+ current_connection->state &= ~FLAG_IS_TRIGGER;
+ current_connection->links[ link_id ] = 0;
+ }
+
+ if( drag_ptr->links[ link_id ^ 0x1 ] )
+ {
+ vg_warn( "Destroying alternate link %u (%hu)\n", link_id ^ 0x1, drag_ptr->links[ link_id ^ 0x1 ] );
+
+ struct cell *current_connection = &world.data[ drag_ptr->links[ link_id ^ 0x1 ]];
+ if( !current_connection->links[ link_id ] )
+ current_connection->state &= ~FLAG_TARGETED;
+
+ current_connection->links[ link_id ^ 0x1 ] = 0;
+ drag_ptr->links[ link_id ^ 0x1 ] = 0;
+ }
+
+ // Create the new connection
+ vg_success( "Creating connection on link %u (%hu)\n", link_id, id_drag_from );
+
+ cell_ptr->links[ link_id ] = id_drag_from;
+ drag_ptr->links[ link_id ] = world.selected;
+
+ cell_ptr->state |= FLAG_TARGETED;
+ drag_ptr->state |= FLAG_IS_TRIGGER;
+ id_drag_from = 0;
+ }
+ }
+ }
+ else
+ world.selected = -1;
+
+ if( !(vg_get_button("secondary") && id_drag_from) )
+ id_drag_from = 0;
+ }
+ else
+ {
+ world.selected = -1;
+ id_drag_from = 0;
+ }
+
+ // Simulation stop/start
+ if( vg_get_button_down("go") )
+ {
+ if( world.simulating )
+ {
+ simulation_stop();
+ }
+ else
+ {
+ vg_success( "Starting simulation!\n" );
+
+ sfx_set_playrnd( &audio_rolls, &audio_system_balls_rolling, 0, 1 );
+
+ world.simulating = 1;
+ world.num_fishes = 0;
+ world.sim_frame = 0;
+ world.sim_start = vg_time;
+ world.sim_run = 0;
+ world.sim_speed = 2.5f;
+
+ for( int i = 0; i < world.w*world.h; i ++ )
+ world.data[ i ].state &= ~FLAG_FLIP_FLOP;
+
+ io_reset();
+ }
+ }
+
+ // Fish ticks
+ if( world.simulating )
+ {
+ while( world.sim_frame < (int)((vg_time-world.sim_start)*world.sim_speed) )
+ {
+ //vg_info( "frame: %u\n", world.sim_frame );
+ sfx_set_playrnd( &audio_random, &audio_system_balls_switching, 0, 9 );
+
+ // 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;
+ }
+ if( cell->state & FLAG_IS_TRIGGER )
+ cell->state &= ~FLAG_TRIGGERED;
+ }
+
+ int alive_count = 0;
+
+ // Update fish positions
+ for( int i = 0; i < world.num_fishes; i ++ )
+ {
+ struct fish *fish = &world.fishes[i];
+
+ if( fish->state == k_fish_state_soon_dead )
+ fish->state = k_fish_state_dead;
+
+ if( fish->state == k_fish_state_soon_alive )
+ fish->state = k_fish_state_alive;
+
+ if( fish->state < k_fish_state_alive )
+ continue;
+
+ struct cell *cell_current = pcell( fish->pos );
+
+ if( fish->state == k_fish_state_alive )
+ {
+ // Apply to output
+ if( cell_current->state & FLAG_OUTPUT )
+ {
+ for( int j = 0; j < arrlen( world.io ); j ++ )
+ {
+ struct cell_terminal *term = &world.io[j];
+
+ if( term->id == fish->pos[1]*world.w + fish->pos[0] )
+ {
+ struct terminal_run *run = &term->runs[ world.sim_run ];
+ if( run->recv_count < vg_list_size( run->recieved ) )
+ run->recieved[ run->recv_count ++ ] = fish->payload;
+
+ break;
+ }
+ }
+
+ fish->state = k_fish_state_dead;
+ continue;
+ }
+
+
+ if( cell_current->config == k_cell_type_merge )
+ {
+ // Can only move up
+ fish->dir[0] = 0;
+ fish->dir[1] = -1;
+ fish->flow_reversed = 0;
+ }
+ else
+ {
+ if( cell_current->config == k_cell_type_split )
+ {
+ // Flip flop L/R
+ fish->dir[0] = cell_current->state&FLAG_FLIP_FLOP?1:-1;
+ fish->dir[1] = 0;
+
+ if( !(cell_current->state & FLAG_TARGETED) )
+ cell_current->state ^= FLAG_FLIP_FLOP;
+ }
+ else
+ {
+ // Apply cell out-flow
+ struct cell_description *desc = &cell_descriptions[ cell_current->config ];
+
+ v2i_copy( fish->flow_reversed? desc->start: desc->end, fish->dir );
+ }
+
+ v2i pos_next;
+ v2i_add( fish->pos, fish->dir, pos_next );
+
+ struct cell *cell_next = pcell( pos_next );
+
+ if( cell_next->state & (FLAG_CANAL|FLAG_OUTPUT) )
+ {
+ struct cell_description *desc = &cell_descriptions[ cell_next->config ];
+
+ if( cell_next->config == k_cell_type_merge )
+ {
+ if( fish->dir[0] == 0 )
+ fish->state = k_fish_state_dead;
+ else
+ fish->flow_reversed = 0;
+ }
+ else
+ {
+ if( cell_next->config == k_cell_type_split )
+ {
+ if( fish->dir[0] == 0 )
+ {
+ sfx_set_playrnd( &audio_splitter, &audio_system_balls_important, 0, 1 );
+ cell_next->state |= FLAG_FLIP_ROTATING;
+
+ fish->flow_reversed = 0;
+ }
+ else
+ fish->state = k_fish_state_dead;
+ }
+ else
+ fish->flow_reversed = ( fish->dir[0] != -desc->start[0] ||
+ fish->dir[1] != -desc->start[1] )? 1: 0;
+ }
+ }
+ else
+ fish->state = world_check_pos_ok( fish->pos )? k_fish_state_bg: k_fish_state_dead;
+ }
+
+ //v2i_add( fish->pos, fish->dir, fish->pos );
+ }
+ else if( fish->state == k_fish_state_bg )
+ {
+ v2i_add( fish->pos, fish->dir, fish->pos );
+
+ if( !world_check_pos_ok( fish->pos ) )
+ fish->state = k_fish_state_dead;
+ else
+ {
+ struct cell *cell_entry = pcell( fish->pos );
+
+ if( cell_entry->state & FLAG_CANAL )
+ {
+ if( cell_entry->config == k_cell_type_con_r || cell_entry->config == k_cell_type_con_u
+ || cell_entry->config == k_cell_type_con_l || cell_entry->config == k_cell_type_con_d )
+ {
+ sw_set_achievement( "CAN_DO_THAT" );
+
+ fish->state = k_fish_state_soon_alive;
+
+ fish->dir[0] = 0;
+ fish->dir[1] = 0;
+ fish->flow_reversed = 1;
+
+ switch( cell_entry->config )
+ {
+ case k_cell_type_con_r: fish->dir[0] = 1; break;
+ case k_cell_type_con_l: fish->dir[0] = -1; break;
+ case k_cell_type_con_u: fish->dir[1] = 1; break;
+ case k_cell_type_con_d: fish->dir[1] = -1; break;
+ }
+ }
+ }
+ }
+ }
+ else { vg_error( "fish behaviour unimplemented for behaviour type (%d)\n" ); }
+
+ if( fish->state >= k_fish_state_alive )
+ alive_count ++;
+ }
+
+ // Second pass (triggers)
+ for( int i = 0; i < world.num_fishes; i ++ )
+ {
+ struct fish *fish = &world.fishes[i];
+
+ if( fish->state == k_fish_state_alive )
+ {
+ v2i_add( fish->pos, fish->dir, fish->pos );
+ struct cell *cell_current = pcell( fish->pos );
+
+ if( cell_current->state & FLAG_IS_TRIGGER )
+ {
+ int trigger_id = cell_current->links[0]?0:1;
+ int connection_id = cell_current->links[trigger_id];
+ int target_px = connection_id % world.w;
+ int target_py = (connection_id - target_px)/world.w;
+
+ vg_line2( (v2f){ fish->pos[0], fish->pos[1] }, (v2f){ target_px, target_py }, 0xffffffff, 0xffffffff );
+
+ struct cell *target_peice = &world.data[ cell_current->links[trigger_id] ];
+
+ cell_current->state |= FLAG_TRIGGERED;
+
+ if( trigger_id )
+ target_peice->state |= FLAG_FLIP_FLOP;
+ else
+ target_peice->state &= ~FLAG_FLIP_FLOP;
+ }
+ }
+ }
+
+ // Third pass (collisions)
+ struct fish *fi, *fj;
+
+ for( int i = 0; i < world.num_fishes; i ++ )
+ {
+ fi = &world.fishes[i];
+
+ if( fi->state == k_fish_state_alive )
+ {
+ int continue_again = 0;
+
+ for( int j = i+1; j < world.num_fishes; j ++ )
+ {
+ fj = &world.fishes[j];
+
+ if( (fj->state == k_fish_state_alive) )
+ {
+ v2i fi_prev;
+ v2i fj_prev;
+
+ v2i_sub( fi->pos, fi->dir, fi_prev );
+ v2i_sub( fj->pos, fj->dir, fj_prev );
+
+ int
+ collide_next_frame = (
+ (fi->pos[0] == fj->pos[0]) &&
+ (fi->pos[1] == fj->pos[1]))? 1: 0,
+ collide_this_frame = (
+ (fi_prev[0] == fj->pos[0]) &&
+ (fi_prev[1] == fj->pos[1]) &&
+ (fj_prev[0] == fi->pos[0]) &&
+ (fj_prev[1] == fi->pos[1])
+ )? 1: 0;
+
+ if( collide_next_frame || collide_this_frame )
+ {
+ sw_set_achievement( "BANG" );
+
+ // Shatter death (+0.5s)
+ float death_time = collide_this_frame? 0.0f: 0.5f;
+
+ fi->state = k_fish_state_soon_dead;
+ fj->state = k_fish_state_soon_dead;
+ fi->death_time = death_time;
+ fj->death_time = death_time;
+
+ continue_again = 1;
+ break;
+ }
+ }
+ }
+ if( continue_again )
+ continue;
+ }
+ }
+
+ // Spawn fishes
+ for( int i = 0; i < arrlen( world.io ); i ++ )
+ {
+ struct cell_terminal *term = &world.io[ i ];
+ int posx = term->id % world.w;
+ int posy = (term->id - posx)/world.w;
+ int is_input = world.data[ term->id ].state & FLAG_INPUT;
+
+ if( is_input )
+ {
+ if( world.sim_frame < term->runs[ world.sim_run ].condition_count )
+ {
+ struct fish *fish = &world.fishes[ world.num_fishes ];
+ fish->pos[0] = posx;
+ fish->pos[1] = posy;
+ fish->state = k_fish_state_alive;
+ fish->payload = term->runs[ world.sim_run ].conditions[ world.sim_frame ];
+
+ struct cell *cell_ptr = pcell( fish->pos );
+
+ if( cell_ptr->config != k_cell_type_stub )
+ {
+ struct cell_description *desc = &cell_descriptions[ cell_ptr->config ];
+
+ v2i_copy( desc->start, fish->dir );
+ fish->flow_reversed = 1;
+
+ world.num_fishes ++;
+ alive_count ++;
+ }
+ }
+ }
+ }
+
+ if( alive_count == 0 )
+ {
+ world.completed = 1;
+
+ for( int i = 0; i < arrlen( world.io ); i ++ )
+ {
+ struct cell_terminal *term = &world.io[ i ];
+ int is_input = world.data[ term->id ].state & FLAG_INPUT;
+
+ if( !is_input )
+ {
+ struct terminal_run *run = &term->runs[ world.sim_run ];
+
+ if( run->recv_count == run->condition_count )
+ {
+ for( int j = 0; j < run->condition_count; j ++ )
+ {
+ if( run->recieved[j] != run->conditions[j] )
+ {
+ world.completed = 0;
+ break;
+ }
+ }
+ }
+ else
+ {
+ world.completed = 0;
+ break;
+ }
+ }
+ }
+
+ if( world.completed )
+ {
+ if( world.sim_run < world.max_runs-1 )
+ {
+ vg_success( "Run passed, starting next\n" );
+ world.sim_run ++;
+ world.sim_frame = 0;
+ world.sim_start = vg_time;
+ world.num_fishes = 0;
+
+ for( int i = 0; i < world.w*world.h; i ++ )
+ world.data[ i ].state &= ~FLAG_FLIP_FLOP;
+
+ continue;
+ }
+ else
+ {
+ vg_success( "Level passed!\n" );
+
+ u32 score = 0;
+ for( int i = 0; i < world.w*world.h; i ++ )
+ if( world.data[ i ].state & FLAG_CANAL )
+ score ++;
+
+ world.score = score;
+ world.time = world.sim_frame;
+ }
+ }
+ else
+ {
+ if( world.sim_run > 0 )
+ sw_set_achievement( "GOOD_ENOUGH" );
+
+ vg_error( "Level failed :(\n" );
+ }
+
+ // Copy into career data
+ if( world.ptr_career_level )
+ {
+ world.ptr_career_level->score = world.score;
+ world.ptr_career_level->time = world.time;
+ world.ptr_career_level->completed = world.completed;