Imported existing code

indra/newview/llviewercamera.h

@@ -0,0 +1,123 @@
+/** 
+ * @file llviewercamera.h
+ * @brief LLViewerCamera class header file
+ *
+ * $LicenseInfo:firstyear=2002&license=viewergpl$
+ * 
+ * Copyright (c) 2002-2009, Linden Research, Inc.
+ * 
+ * Second Life Viewer Source Code
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at
+ * http://secondlifegrid.net/programs/open_source/licensing/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLVIEWERCAMERA_H
+#define LL_LLVIEWERCAMERA_H
+
+#include "llcamera.h"
+#include "lltimer.h"
+#include "llstat.h"
+#include "m4math.h"
+
+class LLCoordGL;
+class LLViewerObject;
+
+// This rotation matrix moves the default OpenGL reference frame 
+// (-Z at, Y up) to Cory's favorite reference frame (X at, Z up)
+const F32 OGL_TO_CFR_ROTATION[16] = {  0.f,  0.f, -1.f,  0.f, 	// -Z becomes X
+									  -1.f,  0.f,  0.f,  0.f, 	// -X becomes Y
+									   0.f,  1.f,  0.f,  0.f,	//  Y becomes Z
+									   0.f,  0.f,  0.f,  1.f };
+
+const BOOL FOR_SELECTION = TRUE;
+const BOOL NOT_FOR_SELECTION = FALSE;
+
+class LLViewerCamera : public LLCamera, public LLSingleton<LLViewerCamera>
+{
+public:
+	LLViewerCamera();
+
+	void updateCameraLocation(const LLVector3 &center,
+								const LLVector3 &up_direction,
+								const LLVector3 &point_of_interest);
+
+	static void updateFrustumPlanes(LLCamera& camera, BOOL ortho = FALSE, BOOL zflip = FALSE, BOOL no_hacks = FALSE);
+	void setPerspective(BOOL for_selection, S32 x, S32 y_from_bot, S32 width, S32 height, BOOL limit_select_distance, F32 z_near = 0, F32 z_far = 0);
+
+	const LLMatrix4 &getProjection() const;
+	const LLMatrix4 &getModelview() const;
+
+	// Warning!  These assume the current global matrices are correct
+	void projectScreenToPosAgent(const S32 screen_x, const S32 screen_y, LLVector3* pos_agent ) const;
+	BOOL projectPosAgentToScreen(const LLVector3 &pos_agent, LLCoordGL &out_point, const BOOL clamp = TRUE) const;
+	BOOL projectPosAgentToScreenEdge(const LLVector3 &pos_agent, LLCoordGL &out_point) const;
+
+	const LLVector3* getVelocityDir() const {return &mVelocityDir;}
+	LLStat *getVelocityStat() { return &mVelocityStat; }
+	LLStat *getAngularVelocityStat() { return &mAngularVelocityStat; }
+	F32     getCosHalfFov() {return mCosHalfCameraFOV;}
+	F32     getAverageSpeed() {return mAverageSpeed ;}
+	F32     getAverageAngularSpeed() {return mAverageAngularSpeed;}
+
+	void getPixelVectors(const LLVector3 &pos_agent, LLVector3 &up, LLVector3 &right);
+	LLVector3 roundToPixel(const LLVector3 &pos_agent);
+
+	// Sets the current matrix
+	/* virtual */ void setView(F32 vertical_fov_rads);
+
+	void setDefaultFOV(F32 fov) ;
+	F32 getDefaultFOV() { return mCameraFOVDefault; }
+
+	BOOL cameraUnderWater() const;
+
+	const LLVector3 &getPointOfInterest() { return mLastPointOfInterest; }
+	BOOL areVertsVisible(LLViewerObject* volumep, BOOL all_verts);
+	F32 getPixelMeterRatio() const				{ return mPixelMeterRatio; }
+	S32 getScreenPixelArea() const				{ return mScreenPixelArea; }
+
+	void setZoomParameters(F32 factor, S16 subregion) { mZoomFactor = factor; mZoomSubregion = subregion; }
+	F32 getZoomFactor() { return mZoomFactor; }                             
+	S16 getZoomSubRegion() { return mZoomSubregion; } 
+
+protected:
+	void calcProjection(const F32 far_distance) const;
+
+	LLStat mVelocityStat;
+	LLStat mAngularVelocityStat;
+	LLVector3 mVelocityDir ;
+	F32       mAverageSpeed ;
+	F32       mAverageAngularSpeed ;
+
+	mutable LLMatrix4	mProjectionMatrix;	// Cache of perspective matrix
+	mutable LLMatrix4	mModelviewMatrix;
+	F32					mCameraFOVDefault;
+	F32					mCosHalfCameraFOV;
+	LLVector3			mLastPointOfInterest;
+	F32					mPixelMeterRatio; // Divide by distance from camera to get pixels per meter at that distance.
+	S32					mScreenPixelArea; // Pixel area of entire window
+	F32					mZoomFactor;
+	S16					mZoomSubregion;
+
+public:
+};
+
+#endif // LL_LLVIEWERCAMERA_H