Initial commit

engines/tetraedge/te/te_light.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 "graphics/renderer.h"
+
+#include "tetraedge/tetraedge.h"
+
+#include "tetraedge/te/te_light.h"
+#include "tetraedge/te/te_light_opengl.h"
+#include "tetraedge/te/te_light_tinygl.h"
+#include "tetraedge/te/te_color.h"
+#include "tetraedge/te/te_quaternion.h"
+#include "tetraedge/te/te_vector3f32.h"
+
+namespace Tetraedge {
+
+/*static*/
+uint32 TeLight::_globalAmbientColor = 0xffffffff;
+
+TeLight::TeLight() : _colAmbient(0, 0, 0, 0xff), _colDiffuse(0, 0, 0, 0xff), _colSpecular(0xff, 0xff, 0xff, 0xff),
+_constAtten(1.0f), _linearAtten(0.0f), _quadraticAtten(0.0f), _cutoff(0.0f), _exponent(0.0f), _type(LightTypePoint),
+_displaySize(3.0f)
+{
+}
+
+TeVector3f32 TeLight::directionVector() const {
+	float cosx = cosf(_positionRadial.getX());
+	float cosy = cosf(_positionRadial.getY());
+	float sinx = sinf(_positionRadial.getX());
+	float siny = sinf(_positionRadial.getY());
+	return TeVector3f32(cosx * cosy, siny, sinx * cosy);
+}
+
+void TeLight::transformDirPoint(const TeVector3f32 &pt1, TeVector3f32 &pt2) {
+	const TeQuaternion q1 = TeQuaternion::fromAxisAndAngle(TeVector3f32(0, 1, 0), _positionRadial.getX() + M_PI);
+	const TeQuaternion q2 = TeQuaternion::fromAxisAndAngle(TeVector3f32(0, 0, -1), -_positionRadial.getY());
+	pt2.rotate(q2);
+	pt2.rotate(q1);
+	pt2 += pt1;
+}
+
+void TeLight::transformSpotPoint(TeVector3f32 &pt) {
+	const TeQuaternion q1 = TeQuaternion::fromAxisAndAngle(TeVector3f32(0, 1, 0), _positionRadial.getX());
+	const TeQuaternion q2 = TeQuaternion::fromAxisAndAngle(TeVector3f32(0, 0, -1), _positionRadial.getY());
+	pt.rotate(q2);
+	pt.rotate(q1);
+	pt += _position3d;
+}
+
+Common::String TeLight::dump() const {
+	const char *ltype;
+	switch (_type) {
+		case LightTypeSpot:
+			ltype = "Spot";
+			break;
+		case LightTypePoint:
+			ltype = "Point";
+			break;
+		case LightTypeDirectional:
+			ltype = "Directional";
+			break;
+		default:
+			error("Invalid light type %d", (int)_type);
+	}
+
+	return Common::String::format("%sLight(\n\tamb:%s diff:%s spec:%s\n\tpos:%s posRad:%s atten:%.02f %.02f %.02f\n\tcutoff:%.02f exp:%.02f dispSz:%.02f\n)",
+		ltype, _colAmbient.dump().c_str(), _colDiffuse.dump().c_str(),
+		_colSpecular.dump().c_str(), _position3d.dump().c_str(),
+		_positionRadial.dump().c_str(), _constAtten, _linearAtten,
+		_quadraticAtten, _cutoff, _exponent, _displaySize);
+}
+
+void TeLight::correctAttenuation() {
+	if (!_constAtten && !_linearAtten && !_quadraticAtten)
+		_constAtten = 1.0;
+}
+
+/*static*/
+TeLight *TeLight::makeInstance() {
+	Graphics::RendererType r = g_engine->preferredRendererType();
+
+#if defined(USE_OPENGL_GAME)
+	if (r == Graphics::kRendererTypeOpenGL)
+		return new TeLightOpenGL();
+#endif
+
+#if defined(USE_TINYGL)
+	if (r == Graphics::kRendererTypeTinyGL)
+		return new TeLightTinyGL();
+#endif
+	error("Couldn't create TeLight for selected renderer");
+}
+
+} // end namespace Tetraedge