Initial commit

engines/tetraedge/te/te_pick_mesh.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 "math/ray.h"
+
+#include "tetraedge/te/te_pick_mesh.h"
+
+namespace Tetraedge {
+
+TePickMesh::TePickMesh() : _enabled(true) {
+}
+
+TePickMesh::TePickMesh(const TePickMesh &other) : _enabled(true) {
+	copy(other);
+}
+
+void TePickMesh::copy(const TePickMesh &other) {
+	_enabled = other._enabled;
+	_name = other._name;
+	_v1 = other._v1;
+	_v2 = other._v2;
+	_v3 = other._v3;
+	_verticies = other._verticies;
+}
+
+void TePickMesh::destroy() {
+	_verticies.clear();
+}
+
+void TePickMesh::getTriangle(uint triNum, TeVector3f32 &v1, TeVector3f32 &v2, TeVector3f32 &v3) const {
+	assert(triNum < nTriangles());
+	v1 = _verticies[triNum * 3];
+	v2 = _verticies[triNum * 3 + 1];
+	v3 = _verticies[triNum * 3 + 2];
+}
+
+bool TePickMesh::intersect(const Math::Ray &ray, TeVector3f32 &ptOut, float &lenOut) const {
+	if (!_enabled || _verticies.empty())
+		return false;
+	float nearest = FLT_MAX;
+	for (uint i = 0; i < _verticies.size() / 3; i++) {
+		float idist;
+		Math::Vector3d iloc;
+		if (ray.intersectTriangle(_verticies[i * 3], _verticies[i * 3 + 1], _verticies[i * 3 + 2], iloc, idist)) {
+			if (idist < nearest)
+				nearest = idist;
+		}
+	}
+	if (nearest != FLT_MAX) {
+		ptOut = ray.getOrigin() + ray.getDirection() * nearest;
+		lenOut = nearest;
+		return true;
+	}
+	return false;
+}
+
+void TePickMesh::nbTriangles(uint nTriangles) {
+	destroy();
+	_verticies.clear();
+	_verticies.resize(nTriangles * 3);
+}
+
+TePickMesh &TePickMesh::operator+=(const TePickMesh &other) {
+	if (other.nTriangles())
+		_verticies.push_back(other._verticies);
+
+	return *this;
+}
+
+TePickMesh &TePickMesh::operator=(const TePickMesh &other) {
+	copy(other);
+	return *this;
+}
+
+void TePickMesh::setTriangle(uint triNum, const TeVector3f32 &v1, const TeVector3f32 &v2, const TeVector3f32 &v3) {
+	assert(triNum < nTriangles());
+	_verticies[triNum * 3] = v1;
+	_verticies[triNum * 3 + 1] = v2;
+	_verticies[triNum * 3 + 2] = v3;
+}
+
+} // end namespace Tetraedge