medfall

commit 5e4efedc0a68600f7cdb2b3e4025ac933d853e27
parent e878ae9c8dbe6ab0ba45c2c44cbc18d272991ead
Author: Michael Savage <mikejsavage@gmail.com>
Date:   Sat,  4 Nov 2017 15:40:15 +0200

Don't use DynamicArray when generating the clipmap tile mesh

Diffstat:
clipmap.cc
 | 
46
+++++++++++++++++++++++++++++-----------------

1 file changed, 29 insertions(+), 17 deletions(-)
diff --git a/clipmap.cc b/clipmap.cc
@@ -113,31 +113,43 @@ GAME_INIT( game_init ) {
 		}
 	}
 
+	// generate tile mesh
 	{
-		DynamicArray< v3 > vertices;
-		for( u32 y = 0; y < PATCH_RESOLUTION + 1; y++ ) {
-			for( u32 x = 0; x < PATCH_RESOLUTION + 1; x++ ) {
-				vertices.append( v3( x, y, 0 ) );
+		MEMARENA_SCOPED_CHECKPOINT( &mem->persistent_arena );
+
+		array< v3 > vertices = alloc_array< v3 >( &mem->persistent_arena, ( PATCH_RESOLUTION + 1 ) * ( PATCH_RESOLUTION + 1 ) );
+		{
+			size_t i = 0;
+			for( u32 y = 0; y < PATCH_RESOLUTION + 1; y++ ) {
+				for( u32 x = 0; x < PATCH_RESOLUTION + 1; x++ ) {
+					vertices[ i ] = v3( x, y, 0 );
+					i++;
+				}
 			}
 		}
 
-		DynamicArray< u32 > indices;
-		for( u32 y = 0; y < PATCH_RESOLUTION; y++ ) {
-			for( u32 x = 0; x < PATCH_RESOLUTION; x++ ) {
-				indices.append( patch2d( x, y ) );
-				indices.append( patch2d( x + 1, y + 1 ) );
-				indices.append( patch2d( x, y + 1 ) );
-
-				indices.append( patch2d( x, y ) );
-				indices.append( patch2d( x + 1, y ) );
-				indices.append( patch2d( x + 1, y + 1 ) );
+		array< u32 > indices = alloc_array< u32 >( &mem->persistent_arena, PATCH_RESOLUTION * PATCH_RESOLUTION * 6 );
+		{
+			size_t i = 0;
+			for( u32 y = 0; y < PATCH_RESOLUTION; y++ ) {
+				for( u32 x = 0; x < PATCH_RESOLUTION; x++ ) {
+					indices[ i + 0 ] = patch2d( x, y );
+					indices[ i + 1 ] = patch2d( x + 1, y + 1 );
+					indices[ i + 2 ] = patch2d( x, y + 1 );
+
+					indices[ i + 3 ] = patch2d( x, y );
+					indices[ i + 4 ] = patch2d( x + 1, y );
+					indices[ i + 5 ] = patch2d( x + 1, y + 1 );
+
+					i += 6;
+				}
 			}
 		}
 
 		MeshConfig mesh_config;
-		mesh_config.positions = renderer_new_vb( vertices.ptr(), vertices.num_bytes() );
-		mesh_config.indices = renderer_new_ib( indices.ptr(), indices.num_bytes() );
-		mesh_config.num_vertices = indices.size();
+		mesh_config.positions = renderer_new_vb( vertices );
+		mesh_config.indices = renderer_new_ib( indices );
+		mesh_config.num_vertices = indices.n;
 		clipmap.tile = renderer_new_mesh( mesh_config );
 	}