start of request chunks from client

1 files changed, 35 insertions, 7 deletions

diff --git a/client/main.ha b/client/main.ha
index de6b2fd..9f43aaf 100644
--- a/client/main.ha
+++ b/client/main.ha
@@ -26,7 +26,7 @@ export fn main() void = {
 
 	let offs: []pos = [];
 	for (let x = -1; x < 3; x+=1) for (let y = -1; y < 3; y+=1)
-		append(offs, (1024+x*CHUNKSIZE,y*CHUNKSIZE));
+		append(offs, (1024*1024+x*CHUNKSIZE,y*CHUNKSIZE));
 
 	let pictures: []drawing::picture = alloc([],NCHUNKS);
 	let picture_surfaces: []*sdl2::SDL_Surface = alloc([], NCHUNKS);
@@ -48,11 +48,7 @@ export fn main() void = {
 			fmt::fatal("couldn't connect to server:",net::strerror(err));
 	};
 
-	for (let i = 0; i < 3; i += 1) {
-		packet_reader::send(conn, (
-			i*CHUNKSIZE,i*CHUNKSIZE
-		):packet_reader::packet_reqchunk)!;
-	};
+
 	
 	const pollfd: [1]poll::pollfd = [ poll::pollfd {
 		fd = conn, events=poll::event::POLLIN, revents = 0
@@ -70,6 +66,7 @@ export fn main() void = {
 	// in WORLD coords
 	let mouse_pos: pos = (0,0);
 	let mouse_down = false;
+	request_visible_chunks(pictures, conn, camera_pos);
 	for (!quit) {
 		const did_move = do_movement(&camera_pos);
 
@@ -218,5 +215,36 @@ fn find_picture_for_chunkdata(camera_pos: pos, world_pos: pos, pictures: []drawi
 };
 
 
-	
+
+fn floor_div(a: i32, b: i32) i32 = {
+	if (a < 0) return -1-floor_div(-(a+1),b);
+	return a / b;
+};
+fn find_chunk(pictures: []drawing::picture, world_pos: pos)
+		nullable *drawing::picture = {
+	for (const pic &.. pictures) {
+		if (pic.world_pos.0 == world_pos.0
+			&& pic.world_pos.1 == world_pos.1) {
+			return pic;
+		};
+	};
+	return null;
+};
+
+fn request_visible_chunks(pictures: []drawing::picture, conn: net::socket, camera_pos: pos) void = {
+	const x0 = CHUNKSIZE*floor_div(camera_pos.0,CHUNKSIZE);
+	const y0 = CHUNKSIZE*floor_div(camera_pos.1,CHUNKSIZE);
+
+	for (let dx = 0i32; dx < 3; dx += 1) for (let dy = 0i32; dy < 3; dy += 1) {
+		let world_pos = (x0+CHUNKSIZE*dx, y0+CHUNKSIZE*dy): pos;
+		fmt::printfln("investigating {},{}", world_pos.0, world_pos.1)!;
+		match (find_chunk(pictures,world_pos)) {
+		case *drawing::picture => yield;
+		case null =>
+			fmt::printfln("requesting {},{}", world_pos.0, world_pos.1)!;
+			packet_reader::send(conn, world_pos: packet_reader::packet_reqchunk)!;
+		};
+	};
+};
+