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engines/scumm/he/basketball/collision/bball_collision_node.cpp

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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/>.
+ *
+ */
+
+#include "scumm/he/basketball/collision/bball_collision_support_obj.h"
+#include "scumm/he/basketball/collision/bball_collision_object.h"
+#include "scumm/he/basketball/collision/bball_collision_sphere.h"
+#include "scumm/he/basketball/collision/bball_collision_box.h"
+#include "scumm/he/basketball/collision/bball_collision_cylinder.h"
+#include "scumm/he/basketball/collision/bball_collision_stack.h"
+#include "scumm/he/basketball/collision/bball_collision_node.h"
+#include "scumm/he/basketball/collision/bball_collision_tree.h"
+
+namespace Scumm {
+
+CCollisionNode::CCollisionNode() {
+	for (int i = 0; i < NUM_CHILDREN_NODES; i++) {
+		_child[i] = nullptr;
+	}
+
+	_quadrant.setMinPoint(0, 0);
+	_quadrant.setMaxPoint(0, 0);
+
+	_isExternal = false;
+}
+
+CCollisionNode::CCollisionNode(const CCollisionObjectVector &initObjects) : _objectList(initObjects) {
+	for (int i = 0; i < NUM_CHILDREN_NODES; i++) {
+		_child[i] = nullptr;
+	}
+
+	_quadrant.setMinPoint(0, 0);
+	_quadrant.setMaxPoint(0, 0);
+
+	_isExternal = false;
+}
+
+CCollisionNode::~CCollisionNode() {
+	if (!_isExternal) {
+		for (int i = 0; i < NUM_CHILDREN_NODES; i++) {
+			assert(_child[i]);
+			delete _child[i];
+			_child[i] = nullptr;
+		}
+	}
+}
+
+U32BoundingBox CCollisionNode::getChildQuadrant(const U32BoundingBox &parentQuadrant, EChildID childID) {
+	int minX, minY;
+	int maxX, maxY;
+
+	int centerX = ((parentQuadrant.getMinPoint().x + parentQuadrant.getMaxPoint().x) / 2);
+	int centerY = ((parentQuadrant.getMinPoint().y + parentQuadrant.getMaxPoint().y) / 2);
+
+	switch (childID) {
+
+	case kChild1:
+		minX = centerX;
+		minY = parentQuadrant.getMinPoint().y;
+		maxX = parentQuadrant.getMaxPoint().x;
+		maxY = centerY;
+		break;
+
+	case kChild2:
+		minX = centerX;
+		minY = centerY;
+		maxX = parentQuadrant.getMaxPoint().x;
+		maxY = parentQuadrant.getMaxPoint().y;
+		break;
+
+	case kChild3:
+		minX = parentQuadrant.getMinPoint().x;
+		minY = centerY;
+		maxX = centerX;
+		maxY = parentQuadrant.getMaxPoint().y;
+		break;
+
+	case kChild4:
+		minX = parentQuadrant.getMinPoint().x;
+		minY = parentQuadrant.getMinPoint().y;
+		maxX = centerX;
+		maxY = centerY;
+		break;
+
+	default:
+		warning("CCollisionNode::getChildQuadrant(): Invalid childID passed to getChildQuadrant");
+		minX = 0;
+		minY = 0;
+		maxX = 0;
+		maxY = 0;
+	}
+
+	U32BoundingBox childQuadrant;
+	childQuadrant.setMinPoint(minX, minY);
+	childQuadrant.setMaxPoint(maxX, maxY);
+	return childQuadrant;
+}
+
+void CCollisionNode::searchTree(const U32BoundingBox &searchRange, CCollisionObjectVector *targetList) const {
+	if (searchRange.intersect(_quadrant)) {
+		if (_isExternal) {
+			// Search through and add points that are within bounds...
+			for (CCollisionObjectVector::size_type objectIndex = 0; objectIndex < _objectList.size(); ++objectIndex) {
+				if (!_objectList[objectIndex]->_ignore) {
+					const ICollisionObject *currentObject = _objectList[objectIndex];
+					targetList->push_back(currentObject);
+				}
+			}
+		} else {
+			// Search all of the children...
+			for (int childID = 0; childID < NUM_CHILDREN_NODES; childID++) {
+				_child[childID]->searchTree(searchRange, targetList);
+			}
+		}
+	}
+}
+
+} // End of namespace Scumm