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engines/wintermute/base/gfx/3dmesh.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/>.
+ *
+ */
+
+/*
+ * This file is based on WME.
+ * http://dead-code.org/redir.php?target=wme
+ * Copyright (c) 2003-2013 Jan Nedoma and contributors
+ */
+
+#include "common/file.h"
+
+#include "engines/wintermute/base/base_game.h"
+#include "engines/wintermute/base/gfx/3dloader_3ds.h"
+#include "engines/wintermute/base/gfx/3dmesh.h"
+#include "engines/wintermute/dcgf.h"
+
+namespace Wintermute {
+
+//////////////////////////////////////////////////////////////////////
+// Construction/Destruction
+//////////////////////////////////////////////////////////////////////
+
+
+//////////////////////////////////////////////////////////////////////////
+Mesh3DS::Mesh3DS(BaseGame *inGame) : BaseNamedObject(inGame) {
+	_vertices = nullptr;
+	_faces = nullptr;
+	_numFaces = _numVertices = 0;
+	_visible = true;
+}
+
+//////////////////////////////////////////////////////////////////////////
+Mesh3DS::~Mesh3DS() {
+	cleanup();
+}
+
+//////////////////////////////////////////////////////////////////////////
+void Mesh3DS::cleanup() {
+	SAFE_DELETE_ARRAY(_vertices);
+	_numVertices = 0;
+
+	SAFE_DELETE_ARRAY(_faces);
+	_numFaces = 0;
+
+	_vb.free();
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool Mesh3DS::createVertexBuffer() {
+	_vb.free();
+
+	if (_numFaces == 0)
+		return true;
+
+	int vbSize = _numFaces * sizeof(Mesh3DSVertex) * 3;
+	_vb = DXBuffer(vbSize);
+	if (_vb.ptr() == nullptr) {
+		_game->LOG(0, "Error creating vertex buffer.");
+		return false;
+	} else
+		return true;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+bool Mesh3DS::fillVertexBuffer(uint32 color) {
+	_vb.free();
+
+	if (_numFaces == 0)
+		return true;
+
+	int vbSize = _numFaces * sizeof(Mesh3DSVertex) * 3;
+	_vb = DXBuffer(vbSize);
+	if (_vb.ptr() == nullptr) {
+		_game->LOG(0, "Error creating vertex buffer.");
+		return false;
+	}
+
+	Mesh3DSVertex *verts = (Mesh3DSVertex *)_vb.ptr();
+
+	for (int i = 0; i < _numFaces; i++) {
+		for (int j = 0; j < 3; j++) {
+			int outVert = i * 3 + j;
+			int vertex = _faces[i]._vertices[j];
+
+			verts[outVert]._x  = _vertices[vertex]._pos._x;
+			verts[outVert]._y  = _vertices[vertex]._pos._y;
+			verts[outVert]._z  = _vertices[vertex]._pos._z;
+
+			verts[outVert]._nx = _faces[i]._normals[j]._x;
+			verts[outVert]._ny = _faces[i]._normals[j]._y;
+			verts[outVert]._nz = _faces[i]._normals[j]._z;
+
+			verts[outVert]._r = RGBCOLGetR(color) / 255.0f;
+			verts[outVert]._g = RGBCOLGetG(color) / 255.0f;
+			verts[outVert]._b = RGBCOLGetB(color) / 255.0f;
+			verts[outVert]._a = RGBCOLGetA(color) / 255.0f;
+		}
+	}
+
+	fillVertexBuffer();
+
+	return true;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+void Mesh3DS::computeNormals() {
+	DXVector3 *normals = new DXVector3[_numVertices];
+	for (uint32 i = 0; i < _numVertices; i++) {
+		normals[i]._x = 0.0f;
+		normals[i]._y = 0.0f;
+		normals[i]._z = 0.0f;
+	}
+
+	for (uint32 i = 0; i < _numFaces; i++) {
+		uint16 a = _faces[i]._vertices[0];
+		uint16 b = _faces[i]._vertices[1];
+		uint16 c = _faces[i]._vertices[2];
+
+		DXVector3 *v1 = &_vertices[a]._pos;
+		DXVector3 *v2 = &_vertices[b]._pos;
+		DXVector3 *v3 = &_vertices[c]._pos;
+
+		DXVector3 edge1 = *v2 - *v1;
+		DXVector3 edge2 = *v3 - *v2;
+		DXVector3 normal;
+		DXVec3Cross(&normal, &edge1, &edge2);
+		DXVec3Normalize(&normal, &normal);
+
+		normals[a] += normal;
+		normals[b] += normal;
+		normals[c] += normal;
+	}
+
+	// Assign the newly computed normals back to the vertices
+	for (uint32 i = 0; i < _numFaces; i++) {
+		for (uint32 j = 0; j < 3; j++) {
+			DXVec3Normalize(&_faces[i]._normals[j], &normals[_faces[i]._vertices[j]]);
+			//_faces[i]._normals[j] = normals[_faces[i]._vertices[j]];
+		}
+	}
+
+	delete[] normals;
+}
+
+//////////////////////////////////////////////////////////////////////////
+bool Mesh3DS::persist(BasePersistenceManager *persistMgr) {
+	persistMgr->transferBool(TMEMBER(_visible));
+	return true;
+}
+
+} // namespace Wintermute