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engines/stark/scene.h

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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/>.
+ *
+ */
+
+#ifndef STARK_SCENE_H
+#define STARK_SCENE_H
+
+#include "common/rect.h"
+
+#include "math/matrix4.h"
+#include "math/ray.h"
+#include "math/vector3d.h"
+
+namespace Stark {
+
+namespace Gfx {
+class Driver;
+class RenderEntry;
+}
+
+/**
+ * Manager for the current game scene
+ */
+class Scene {
+public:
+	Scene(Gfx::Driver *gfx);
+	~Scene();
+
+	void initCamera(const Math::Vector3d &position, const Math::Vector3d &lookAt,
+			float fov, Common::Rect viewSize, float nearClipPlane, float farClipPlane);
+
+	/** Configure rendering so that only the specified rect can be seen */
+	void scrollCamera(const Common::Rect &viewport);
+
+	/** Get the projection matrix (Screen -> Camera) */
+	Math::Matrix4 getProjectionMatrix() const { return _projectionMatrix; }
+
+	/** Get the projection matrix (Camera -> World) */
+	Math::Matrix4 getViewMatrix() const { return _viewMatrix; }
+
+	/**
+	 * Compute a ray in world coordinates going from the camera and through the mouse
+	 *
+	 * @param mouse Mouse position
+	 * @param origin Computed point of origin for the ray
+	 * @param direction Computed direction for the ray
+	 */
+	Math::Ray makeRayFromMouse(const Common::Point &mouse) const;
+
+	/**
+	 * Convert a 3D position in world coordinates into a point in 2D screen space
+	 *
+	 * The computed 2D point is in original game view coordinates.
+	 */
+	Common::Point convertPosition3DToGameScreenOriginal(const Math::Vector3d &obj) const;
+
+	/** Get and set scene fade level */
+	void setFadeLevel(float fadeLevel);
+	float getFadeLevel() const;
+
+	/** Access the sway angle the actors are currently rotated by */
+	void setSwayAngle(const Math::Angle &angle);
+	Math::Angle getSwayAngle() const;
+
+	/** Get the axis for the sway actor rotation, in world coordinates */
+	Math::Vector3d getSwayDirection() const;
+
+	/** Access the float up / down current Z offset for the actors */
+	void setFloatOffset(float floatOffset);
+	float getFloatOffset() const;
+
+	/** Access the maximum length of the horizontal light direction for casting shadows */
+	void setupShadows(bool enabled, float length);
+	bool shouldRenderShadows() const { return _shouldRenderShadows; }
+	float getMaxShadowLength() const { return _maxShadowLength; }
+
+private:
+	void computeClippingRect(float *xmin, float *xmax, float *ymin, float *ymax);
+
+	Gfx::Driver *_gfx;
+
+	Math::Vector3d _cameraPosition;
+	Math::Vector3d _cameraLookDirection;
+	float _fov;
+	Common::Rect _viewSize;
+	Common::Rect _viewport;
+	float _nearClipPlane;
+	float _farClipPlane;
+
+	Math::Matrix4 _projectionMatrix;
+	Math::Matrix4 _viewMatrix;
+
+	float _fadeLevel;
+	Math::Angle _swayAngle;
+	float _floatOffset;
+
+	bool _shouldRenderShadows;
+	float _maxShadowLength;
+};
+
+} // End of namespace Stark
+
+#endif // STARK_SCENE_H