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engines/tetraedge/te/te_ray_intersection.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_ray_intersection.h"
+#include "tetraedge/te/te_pick_mesh.h"
+
+namespace Tetraedge {
+
+namespace TeRayIntersection {
+
+// Note: the TeRayIntersection::intersect function is
+// replaced by Math::Ray::intersectTriangle
+
+TePickMesh *getMesh(const Math::Ray ray, const Common::Array<TePickMesh *> &pickMeshes,
+			float maxDist, float minDist, TeVector3f32 *ptOut) {
+	TeVector3f32 bestPt;
+	TePickMesh *bestMesh = nullptr;
+
+	for (auto *mesh : pickMeshes) {
+		if (!mesh->enabled())
+			continue;
+		for (uint i = 0; i < mesh->nTriangles(); i++) {
+			TeVector3f32 v1;
+			TeVector3f32 v2;
+			TeVector3f32 v3;
+			mesh->getTriangle(i, v1, v2, v3);
+			float intersectDist;
+			TeVector3f32 intersectPt;
+			if (ray.intersectTriangle(v1, v2, v3, intersectPt, intersectDist) && intersectDist < maxDist && intersectDist >= minDist) {
+				bestPt = intersectPt;
+				bestMesh = mesh;
+			}
+		}
+	}
+
+	if (ptOut)
+		*ptOut = bestPt;
+	return bestMesh;
+}
+
+} // end namespace TeRayIntersection
+
+} // end namespace Tetraedge