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engines/crab/Rectangle.h

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+/*
+ * This code is based on the CRAB engine
+ *
+ * Copyright (c) Arvind Raja Yadav
+ *
+ * Licensed under MIT
+ *
+ */
+
+#ifndef CRAB_RECTANGLE_H
+#define CRAB_RECTANGLE_H
+
+#include "crab/Line.h"
+#include "crab/vectors.h"
+
+namespace Crab {
+
+//------------------------------------------------------------------------
+// Purpose: A simple rectangle class
+//------------------------------------------------------------------------
+struct Rect {
+
+	int x;
+	int y;
+	int w;
+	int h;
+
+	Rect(int X = 0, int Y = 0, int W = 0, int H = 0) {
+		x = X;
+		y = Y;
+		w = W;
+		h = H;
+	}
+
+	bool load(rapidxml::xml_node<char> *node, const bool &echo = true, const Common::String &x_name = "x",
+			  const Common::String &y_name = "y", const Common::String &w_name = "w", const Common::String &h_name = "h");
+
+	// Is this rectangle colliding with another rectangle?
+	bool collide(Rect box) const;
+
+	// Extend this rectangle to fully contain another rectangle
+	void extend(Rect box);
+
+	// Resolving a collision means we need to correct the position of the target rectangle to just outside of the reference rectangle
+	// To do this, first we need to determine which edges of the rectangles are colliding
+
+	// Resolve a collision in the X plane
+	Direction resolveX(Rect collider);
+
+	// Resolve a collision in the Y plane
+	Direction resolveY(Rect collider);
+
+	// Does this rectangle contain a point?
+	bool contains(int x1, int y1) {
+		return (x1 > x && x1 < x + w && y1 > y && y1 < y + h);
+	}
+
+	bool contains(Vector2i v) {
+		return contains(v.x, v.y);
+	}
+
+	// Does this rectangle contain another rectangle?
+	bool contains(Rect box) {
+		return (x < box.x && x + w > box.x + box.w && y < box.y && y + h > box.y + box.h);
+	}
+
+	// Flip a rectangle with respect to an axis
+	void flip(const TextureFlipType &flip, const Vector2i &axis);
+
+	// Draw the borders of the rectangle
+	void draw(const int &xOffset = 0, const int &yOffset = 0, const uint8 &r = 0, const uint8 &g = 0, const uint8 &b = 0, const uint8 &a = 255);
+
+	// Check if a rectangle is the same as another
+	bool operator==(const Rect &r) { return r.x == x && r.y == y && r.w == w && r.h == h; }
+
+	// Save to file
+	void saveState(rapidxml::xml_document<> &doc, rapidxml::xml_node<char> *root, const char *name);
+};
+
+} // End of namespace Crab
+
+#endif // CRAB_RECTANGLE_H