Various changes

src/dawn/display/Tileset.cpp

@@ -0,0 +1,78 @@
+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "Tileset.hpp"
+
+using namespace Dawn;
+
+struct Tile Tileset::getTile(int32_t tile) {
+  assertTrue(tile >= 0);
+  assertTrue(tile < this->tiles.size());
+  return this->tiles[tile];
+}
+
+TilesetGrid::TilesetGrid() {
+
+}
+
+
+TilesetGrid::TilesetGrid(
+  int32_t columns,
+  int32_t rows,
+  int32_t w,
+  int32_t h,
+  int32_t gapX,
+  int32_t gapY,
+  int32_t borderX,
+  int32_t borderY
+) {
+  assertTrue(columns >= 1);
+  assertTrue(rows >= 1);
+  assertTrue(w >= 1);
+  assertTrue(h >= 1);
+  assertTrue(gapX >= 0);
+  assertTrue(gapY >= 0);
+  assertTrue(borderX >= 0);
+  assertTrue(borderY >= 0);
+  assertTrue(w >= (columns + (gapX * columns) + borderX + borderX));
+  assertTrue(h >= (rows + (gapY * rows) + borderY + borderY));
+
+  this->rows = rows;
+  this->columns = columns;
+
+  // Calculate division sizes (pixels)
+  this->divX = (w - (borderX * 2) - (gapX * (columns - 1))) / columns;
+  this->divY = (h - (borderY * 2) - (gapY * (rows - 1))) / rows;
+
+  // Calculate the division sizes (units)
+  float_t tdivX = (float_t)this->divX / (float_t)w;
+  float_t tdivY = (float_t)this->divY / (float_t)h;
+
+  for(int32_t y = 0; y < rows; y++) {
+    for(int32_t x = 0; x < columns; x++) {
+      struct Tile tile;
+      tile.uv0.x = (borderX + ((float_t)this->divX * x) + (gapX * x)) / w;
+      tile.uv1.x = tile.uv0.x + tdivX;
+          
+      tile.uv0.y = (borderY + ((float_t)this->divY * y) + (gapY * y)) / h;
+      tile.uv1.y = tile.uv0.y + tdivY;
+      this->tiles.push_back(tile);
+    }
+  }
+}
+
+float_t TilesetGrid::getTileWidth() {
+  return this->divX;
+}
+
+float_t TilesetGrid::getTileHeight() {
+  return this->divY;
+}
+
+struct Tile TilesetGrid::getTileFromGrid(int32_t column, int32_t row) {
+  assertTrue(row > 0 && row < this->rows);
+  assertTrue(column > 0 && column < this->columns);
+  return this->getTile(row + (column * this->rows));
+}