106 lines
3.4 KiB
C++
106 lines
3.4 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* Additional copyright for this file:
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* Copyright (C) 1995-1997 Presto Studios, Inc.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "pegasus/neighborhood/mars/spacechase3d.h"
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namespace Pegasus {
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void project3DTo2D(const Point3D &pt3D, Common::Point &pt2D) {
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pt2D.x = (int)convertSpaceXToScreenH(pt3D.x, pt3D.z);
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pt2D.y = (int)convertSpaceYToScreenV(pt3D.y, pt3D.z);
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}
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void project2DTo3D(const Common::Point &pt2D, const float screenDistance, Point3D &pt3D) {
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pt3D.x = convertScreenHToSpaceX(pt2D.x, screenDistance);
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pt3D.y = convertScreenVToSpaceY(pt2D.y, screenDistance);
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pt3D.z = screenDistance;
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}
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void linearInterp(const Point3D &pt1, const Point3D &pt2, const float t, Point3D &pt3) {
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pt3.x = pt1.x + (pt2.x - pt1.x) * t;
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pt3.y = pt1.y + (pt2.y - pt1.y) * t;
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pt3.z = pt1.z + (pt2.z - pt1.z) * t;
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}
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void linearInterp(const Point3D &pt1, const float x2, const float y2, const float z2, const float t, Point3D &pt3) {
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pt3.x = pt1.x + (x2 - pt1.x) * t;
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pt3.y = pt1.y + (y2 - pt1.y) * t;
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pt3.z = pt1.z + (z2 - pt1.z) * t;
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}
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void linearInterp(const float x1, const float y1, const float z1, const Point3D &pt2, const float t, Point3D &pt3) {
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pt3.x = x1 + (pt2.x - x1) * t;
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pt3.y = y1 + (pt2.y - y1) * t;
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pt3.z = z1 + (pt2.z - z1) * t;
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}
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void linearInterp(const float x1, const float y1, const float z1, const float x2, const float y2, const float z2,
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const float t, Point3D &pt3) {
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pt3.x = x1 + (x2 - x1) * t;
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pt3.y = y1 + (y2 - y1) * t;
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pt3.z = z1 + (z2 - z1) * t;
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}
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void linearInterp(const Common::Point &pt1, const Common::Point &pt2, const float t, Common::Point &pt3) {
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pt3.x = (int)(pt1.x + (pt2.x - pt1.x) * t);
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pt3.y = (int)(pt1.y + (pt2.y - pt1.y) * t);
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}
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void linearInterp(const Common::Point &pt1, const float h2, const float v2, const float t, Common::Point &pt3) {
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pt3.x = (int)(pt1.x + (h2 - pt1.x) * t);
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pt3.y = (int)(pt1.y + (v2 - pt1.y) * t);
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}
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void linearInterp(const float h1, const float v1, const Common::Point &pt2, const float t, Common::Point &pt3) {
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pt3.x = (int)(h1 + (pt2.x - h1) * t);
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pt3.y = (int)(v1 + (pt2.y - v1) * t);
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}
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void linearInterp(const float h1, const float v1, const float h2, const float v2, const float t, Common::Point &pt3) {
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pt3.x = (int)(h1 + (h2 - h1) * t);
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pt3.y = (int)(v1 + (v2 - v1) * t);
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}
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float linearInterp(const float arg1, const float arg2, const float t) {
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return arg1 + (arg2 - arg1) * t;
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}
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bool isNegative(int a) {
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return a < 0;
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}
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bool isPositive(int a) {
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return a > 0;
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}
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int sign(int a) {
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return isNegative(a) ? -1 : isPositive(a) ? 1 : 0;
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}
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bool sameSign(int a, int b) {
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return sign(a) == sign(b);
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}
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} // End of namespace Pegasus
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