From 7608e2967954104771b06612e4e6c21ca7811c9f Mon Sep 17 00:00:00 2001
From: ubq323 <ubq323@ubq323.website>
Date: Sat, 13 Apr 2024 15:12:17 +0100
Subject: client have multiple chunks and recycle them when they are not
 visible

---
 client/main.ha | 77 +++++++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 60 insertions(+), 17 deletions(-)

(limited to 'client')

diff --git a/client/main.ha b/client/main.ha
index 4e6fb9f..28d6694 100644
--- a/client/main.ha
+++ b/client/main.ha
@@ -10,7 +10,10 @@ use unix::poll;
 use packet_reader;
 
 def CHUNKSIZE = 512;
-def NCHUNKS = 4;
+def NCHUNKS = 16;
+
+def WIN_H: i32 = 480;
+def WIN_W: i32 = 640;
 
 export fn main() void = {
 	// sdl init stuff
@@ -22,11 +25,9 @@ export fn main() void = {
 
 	const wsurf = sdl2::SDL_GetWindowSurface(win)!;
 
-	// create 4 pictures. later we will have more pictures
-	// but for now there are just 4, and they are at fixed positions
-	const offs: [_]pos = [
-		(0,0), (0,CHUNKSIZE), (CHUNKSIZE,0), (CHUNKSIZE,CHUNKSIZE),
-	];
+	let offs: []pos = [];
+	for (let x = -1; x < 3; x+=1) for (let y = -1; y < 3; y+=1)
+		append(offs, (x*CHUNKSIZE,y*CHUNKSIZE));
 
 	let pictures: []drawing::picture = alloc([],NCHUNKS);
 	let picture_surfaces: []*sdl2::SDL_Surface = alloc([], NCHUNKS);
@@ -36,7 +37,10 @@ export fn main() void = {
 		append(picture_surfaces, surf);
 		append(pictures, picture_from_surface(surf, offs[i]));
 	};
-	for (const p &.. pictures) drawing::clear_picture(p, 0xffffff);
+	for (const p &.. pictures) {
+		drawing::clear_picture(p, 0x00ff00);
+		drawing::outline_picture(p);
+	};
 
 
 	// connect to server
@@ -64,6 +68,15 @@ export fn main() void = {
 	for (!quit) {
 		do_movement(&camera_pos);
 
+		// let nvis = 0;
+		// for (const pic &.. pictures) {
+		// 	if (is_picture_visible(camera_pos, pic)) {
+		// 		fmt::printfln("  {} {}",pic.world_pos.0, pic.world_pos.1)!;
+		// 		nvis += 1;
+		// 	};
+		// };
+		// fmt::printfln("{} visible",nvis)!;
+
 		let ev = sdl2::event { ... };
 		for (sdl2::SDL_PollEvent(&ev)! == 1) switch (ev.event_type) {
 			case sdl2::SDL_EventType::QUIT => quit = true;
@@ -101,26 +114,24 @@ export fn main() void = {
 					drawing::perform(pictures, opc);
 				case let packet: packet_reader::packet_sendchunk =>
 					fmt::println(packet.world_pos.0, packet.world_pos.1, len(packet.chunk_data))!;
-					let did_set = false;
-					for (let pic &.. pictures) {
-						if (pic.world_pos.0 == packet.world_pos.0 && pic.world_pos.1 == packet.world_pos.1) {
-							pic.d[..len(packet.chunk_data)] = packet.chunk_data[..];
-							fmt::printfln("setting {},{}",pic.world_pos.0,pic.world_pos.1)!;
-							did_set = true;
-							break;
-						};
-					};
-					if (!did_set) fmt::println("did not set anything {},{} ....",packet.world_pos.0,packet.world_pos.1)!;
+					assert(packet.world_pos.0 % CHUNKSIZE == 0
+							&& packet.world_pos.1 % CHUNKSIZE == 0, "bad chunk world pos");
+					const pic = find_picture_for_chunkdata(camera_pos, packet.world_pos, pictures);
+					pic.world_pos = packet.world_pos;
+					pic.d[..len(packet.chunk_data)] = packet.chunk_data[..];
 				};
 			};
 		};
 
+		drawing::clear_picture(&picture_from_surface(wsurf,(9,9)), 0xff0000);
+
 		for (let i = 0z; i < len(pictures); i += 1) {
 			const psurf = picture_surfaces[i];
 			const pic = &pictures[i];
 			render_picture(pic, psurf, wsurf, camera_pos);
 		};
 
+
 		sdl2::SDL_UpdateWindowSurface(win)!;
 		n += 1;
 		sdl2::SDL_Delay(1000/60);
@@ -160,3 +171,35 @@ fn do_movement(pos: *pos) void = {
 	pos.1 += dy * speed;
 };
 
+fn is_picture_visible(camera_pos: pos, pic: *drawing::picture) bool = {
+	const s_min: pos = camera_pos;
+	const s_max: pos = (camera_pos.0 + WIN_W, camera_pos.1 + WIN_H);
+	const p_min: pos = pic.world_pos;
+	const p_max: pos = (pic.world_pos.0 + pic.w: i32, pic.world_pos.1 + pic.h: i32);
+	return (s_min.0 <= p_max.0 && s_max.0 >= p_min.0)
+			&& (s_min.1 <= p_max.1 && s_max.1 >= p_min.1);
+};
+
+fn find_picture_for_chunkdata(camera_pos: pos, world_pos: pos, pictures: []drawing::picture) *drawing::picture = {
+	// if we have one with that exact worldpos, return that
+	// otherwise find one that isn't visible
+
+	let invisible: nullable *drawing::picture = null;
+	
+	for (const pic &.. pictures) {
+		if (pic.world_pos.0 == world_pos.0 && pic.world_pos.1 == world_pos.1) {
+			return pic;
+		};
+		if (invisible == null && !is_picture_visible(camera_pos, pic)) invisible = pic;
+	};
+
+	match (invisible) {
+	case null => abort("couldn't find offscreen picture???");
+	case let p: *drawing::picture => return p;
+	};
+
+};
+
+
+	
+
-- 
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