got my shit in order regarding tilemaps

src/corelib/render.c

@@ -209,9 +209,7 @@ sprite_t make_sprite(const char* file, float x, float y) {
 		.sx=1.0,.sy=1.0,
 		.rot=0,
 		.depth=RLAYER_SPRITES,
-		.uv=(SDL_Rect){
-			.x=0,.y=0,.w=0,.h=0
-		}
+		.uv=(SDL_Rect){0,0,0,0}
 	};
 	SDL_QueryTexture(sprite.texture, NULL, NULL, &sprite.uv.w, &sprite.uv.h);
 	sprite.origin.x = -(float)sprite.uv.h/2.f; sprite.origin.y = -(float)sprite.uv.h/2.f;
@@ -233,8 +231,9 @@ sprite_t sprite_from_spritesheet(spritesheet_t *sheet, int index) {
 
 SDL_Rect get_srcrect_from(spritesheet_t *sheet, int index) {
 	int pixels = index * sheet->tile_width;
+	int w = sheet->w / sheet->tile_width;
 	return (SDL_Rect) {
-		pixels%sheet->w, pixels/sheet->w*sheet->tile_height,
+		pixels%sheet->w, index/w * sheet->tile_height,
 		sheet->tile_width, sheet->tile_height,
 	};
 }

src/game.cc

@@ -1,18 +1,16 @@
 #include "engine.hpp"
+#include "tilemap.hpp"
 #include "corelib/input.h"
 #include "corelib/render.h"
 #include "corelib/assets.h"
 #include "corelib/layers.h"
-#include "tilemap.hpp"
 #include "SDL2/SDL_mouse.h"
 #include <SDL2/SDL_scancode.h>
 
-void on_cycle_tile(int);
-
 int cursor_tile = 1;
 int dragging = 0;
 int drawing = 0;
-sprite_t player;
+sprite_t cursor;
 sprite_t current_tile_display;
 spritesheet_t world_sheet;
 
@@ -36,7 +34,9 @@ void on_clear_key(int down) {
 
 void on_cycle_tile(int axis) {
 	cursor_tile += axis;
-	player.uv = get_srcrect_from(&world_sheet, cursor_tile);
+	if(g_tilemap.tileset.set.size() >= cursor_tile && 0 < cursor_tile) {
+		cursor = g_tilemap.tileset.set.at(cursor_tile-1);
+	}
 }
 
 void on_quit_key(int down) {
@@ -63,20 +63,28 @@ void on_middle_mouse(int down) {
 void load_game() {
 	g_tilemap.width = g_tilemap.height = 10;
 
-	player = make_sprite("tilemap.png", 0, 0);
+	cursor = make_sprite("tilemap.png", 0, 0);
 
 	current_tile_display = make_sprite("tilemap.png", 0, 0);
 	current_tile_display.depth = 0;
 	current_tile_display.sx = 0.15f;
 	current_tile_display.sy = 0.15f;
 
-	world_sheet = make_spritesheet("tilemap.png", 16, 16);
+	world_sheet = make_spritesheet("tilemap.png", 189, 189);
 
 	g_tilemap.tileset.set = {
+		sprite_from_spritesheet(&world_sheet, 0),
 		sprite_from_spritesheet(&world_sheet, 1),
 		sprite_from_spritesheet(&world_sheet, 2),
-		sprite_from_spritesheet(&world_sheet, 3),
-		sprite_from_spritesheet(&world_sheet, 4),
+		sprite_from_spritesheet(&world_sheet, 10),
+		sprite_from_spritesheet(&world_sheet, 11),
+		sprite_from_spritesheet(&world_sheet, 12),
+		sprite_from_spritesheet(&world_sheet, 20),
+		sprite_from_spritesheet(&world_sheet, 21),
+		sprite_from_spritesheet(&world_sheet, 22),
+		sprite_from_spritesheet(&world_sheet, 30),
+		sprite_from_spritesheet(&world_sheet, 31),
+		sprite_from_spritesheet(&world_sheet, 32),
 	};
 
 	for(int i=0;i<g_tilemap.width*g_tilemap.height;++i) {
@@ -103,7 +111,8 @@ void start_game() {
 
 void update_game() {
 	update_input();
-	mouse_world_position(&player.x, &player.y);
+	mouse_world_position(&cursor.x, &cursor.y);
+	cursor.x += 0.1f; cursor.y += 0.1f;
 
 	if(drawing) {
 		int x, y;
@@ -118,16 +127,16 @@ void update_game() {
 void draw_game() {
 	rectshape_t world_outline = {
 		g_tilemap.x, g_tilemap.y, float(g_tilemap.width), float(g_tilemap.height),
-		0.1f, RLAYER_TILEMAP-1, {0,0,0,0}, {255, 255, 255, 255}
+		0.01f, RLAYER_TILEMAP-1, {0,0,0,0}, {255, 255, 255, 255}
 	};
 	rectshape_t cursor_outline = {
-		player.x, player.y, 1.0f, 1.0f, 0.05f, RLAYER_SPRITES-1,
+		cursor.x, cursor.y, 1.0f, 1.0f, 0.01f, RLAYER_SPRITES-1,
 		{0, 0, 0, 0}, {255, 255, 255, 255}
 	};
 
 	draw_rect(&world_outline);
 	draw_rect(&cursor_outline);
-	draw_sprite(&player);
+	draw_sprite(&cursor);
 	draw_tilemap();
 }
 
@@ -136,6 +145,14 @@ void draw_game_ui() {
 		0.0f, 0.0f, 0.15f, 0.15f, 0, 1,
 		{100,100,100,255}, {0,0,0,0}
 	};
+	int w = world_sheet.w / world_sheet.tile_width,
+		h = world_sheet.h / world_sheet.tile_height,
+		offset_selected = cursor_tile - 1;
+	rectshape_t selected_tile_rect = (rectshape_t) {
+		float(offset_selected % w) * 0.015f, float(offset_selected / h) * 0.015f, 0.015f, 0.015f, 0.001f, -1,
+		{0,0,0,0}, {255, 255, 255, 255}
+	};
+	draw_rect(&selected_tile_rect);
 	draw_rect(&shape);
 	draw_sprite(&current_tile_display);
 }

src/tilemap.cc

@@ -3,6 +3,7 @@
 #include "stdio.h"
 #include "string.h"
 #include "signal.h"
+#include "stdio.h"
 
 tilemap_t g_tilemap = {
 	.width = 0,.height = 0,
@@ -13,8 +14,8 @@ void draw_tilemap() {
 	sprite_t sprite;
 	for(int y=0;y<g_tilemap.height;++y) {
 		for(int x=0;x<g_tilemap.width;++x) {
-			auto tile = get_tilemap_tile(x, y);
-			if(tile->value == 0) continue;
+			tile_t* tile = get_tilemap_tile(x, y);
+			if(tile->value <= 0) continue;
 			sprite = g_tilemap.tileset.set[tile->value-1];
 			sprite.depth = RLAYER_TILEMAP;
 			sprite.x = x; sprite.y = y;

tilemap.csv

@@ -1 +1 @@
-10,10,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,3,3,3,1,1,1,1,1,3,3,3,2,2,1,1,1,1,3,3,2,2,2,2,1,1,3,3,3,2,2,2,2,2,1,3,3,3,2,2,2,2,2,2,3,3,3,2,2,2,2,2,2,2,3,3,2,2,2,2,2,2,2,2,
+10,10,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,2,2,3,0,0,0,0,0,0,4,5,5,6,0,0,0,0,0,0,7,8,8,9,0,0,0,0,0,0,7,8,8,9,0,0,0,0,0,0,10,11,11,12,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,