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-rwxr-xr-x[-rw-r--r--]indra/llrender/llrendersphere.cpp194
1 files changed, 51 insertions, 143 deletions
diff --git a/indra/llrender/llrendersphere.cpp b/indra/llrender/llrendersphere.cpp
index e22b753923..26bfe036e8 100644..100755
--- a/indra/llrender/llrendersphere.cpp
+++ b/indra/llrender/llrendersphere.cpp
@@ -2,31 +2,25 @@
* @file llrendersphere.cpp
* @brief implementation of the LLRenderSphere class.
*
- * $LicenseInfo:firstyear=2001&license=viewergpl$
- *
- * Copyright (c) 2001-2009, Linden Research, Inc.
- *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
* 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
+ * Copyright (C) 2010, Linden Research, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
*
- * 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
+ * This library 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
+ * Lesser General Public License for more details.
*
- * 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.
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
@@ -41,143 +35,57 @@
#include "llglheaders.h"
-GLUquadricObj *gQuadObj2 = NULL;
LLRenderSphere gSphere;
-void drawSolidSphere(GLdouble radius, GLint slices, GLint stacks);
-
-void drawSolidSphere(GLdouble radius, GLint slices, GLint stacks)
+void LLRenderSphere::render()
{
- if (!gQuadObj2)
- {
- gQuadObj2 = gluNewQuadric();
- if (!gQuadObj2)
- {
- llwarns << "drawSolidSphere couldn't allocate quadric" << llendl;
- return;
- }
- }
-
- gluQuadricDrawStyle(gQuadObj2, GLU_FILL);
- gluQuadricNormals(gQuadObj2, GLU_SMOOTH);
- // If we ever changed/used the texture or orientation state
- // of quadObj, we'd need to change it to the defaults here
- // with gluQuadricTexture and/or gluQuadricOrientation.
- gluQuadricTexture(gQuadObj2, GL_TRUE);
- gluSphere(gQuadObj2, radius, slices, stacks);
+ renderGGL();
+ gGL.flush();
}
-
-// lat = 0 is Z-axis
-// lon = 0, lat = 90 at X-axis
-void lat2xyz(LLVector3 * result, F32 lat, F32 lon)
+inline LLVector3 polar_to_cart(F32 latitude, F32 longitude)
{
- // Convert a latitude and longitude to x,y,z on a normal sphere and return it in result
- F32 r;
- result->mV[VX] = (F32) (cos(lon * DEG_TO_RAD) * sin(lat * DEG_TO_RAD));
- result->mV[VY] = (F32) (sin(lon * DEG_TO_RAD) * sin(lat * DEG_TO_RAD));
- r = (F32) pow(result->mV[VX] * result->mV[VX] + result->mV[VY] * result->mV[VY], 0.5f);
- if (r == 1.0f)
- {
- result->mV[VZ] = 0.0f;
- }
- else
- {
- result->mV[VZ] = (F32) pow(1 - r*r, 0.5f);
- if (lat > 90.01)
- {
- result->mV[VZ] *= -1.0;
- }
- }
+ return LLVector3(sin(F_TWO_PI * latitude) * cos(F_TWO_PI * longitude),
+ sin(F_TWO_PI * latitude) * sin(F_TWO_PI * longitude),
+ cos(F_TWO_PI * latitude));
}
-void lat2xyz_rad(LLVector3 * result, F32 lat, F32 lon)
-{
- // Convert a latitude and longitude to x,y,z on a normal sphere and return it in result
- F32 r;
- result->mV[VX] = (F32) (cos(lon) * sin(lat));
- result->mV[VY] = (F32) (sin(lon) * sin(lat));
- r = (F32) pow(result->mV[VX] * result->mV[VX] + result->mV[VY] * result->mV[VY], 0.5f);
- if (r == 1.0f)
- result->mV[VZ] = 0.0f;
- else
- {
- result->mV[VZ] = (F32) pow(1 - r*r, 0.5f);
- if (lat > F_PI_BY_TWO) result->mV[VZ] *= -1.0;
- }
-}
-// A couple thoughts on sphere drawing:
-// 1) You need more slices than stacks, but little less than 2:1
-// 2) At low LOD, setting stacks to an odd number avoids a "band" around the equator, making things look smoother
-void LLRenderSphere::prerender()
+void LLRenderSphere::renderGGL()
{
- // Create a series of display lists for different LODs
- mDList[0] = glGenLists(1);
- glNewList(mDList[0], GL_COMPILE);
- drawSolidSphere(1.0, 30, 20);
- glEndList();
+ S32 const LATITUDE_SLICES = 20;
+ S32 const LONGITUDE_SLICES = 30;
- mDList[1] = glGenLists(1);
- glNewList(mDList[1], GL_COMPILE);
- drawSolidSphere(1.0, 20, 15);
- glEndList();
-
- mDList[2] = glGenLists(1);
- glNewList(mDList[2], GL_COMPILE);
- drawSolidSphere(1.0, 12, 8);
- glEndList();
-
- mDList[3] = glGenLists(1);
- glNewList(mDList[3], GL_COMPILE);
- drawSolidSphere(1.0, 8, 5);
- glEndList();
-}
-
-void LLRenderSphere::cleanupGL()
-{
- for (S32 detail = 0; detail < 4; detail++)
+ if (mSpherePoints.empty())
{
- glDeleteLists(mDList[detail], 1);
- mDList[detail] = 0;
+ mSpherePoints.resize(LATITUDE_SLICES + 1);
+ for (S32 lat_i = 0; lat_i < LATITUDE_SLICES + 1; lat_i++)
+ {
+ mSpherePoints[lat_i].resize(LONGITUDE_SLICES + 1);
+ for (S32 lon_i = 0; lon_i < LONGITUDE_SLICES + 1; lon_i++)
+ {
+ F32 lat = (F32)lat_i / LATITUDE_SLICES;
+ F32 lon = (F32)lon_i / LONGITUDE_SLICES;
+
+ mSpherePoints[lat_i][lon_i] = polar_to_cart(lat, lon);
+ }
+ }
}
- if (gQuadObj2)
- {
- gluDeleteQuadric(gQuadObj2);
- gQuadObj2 = NULL;
- }
-}
-
-// Constants here are empirically derived from my eyeballs, JNC
-//
-// The toughest adjustment is the cutoff for the lowest LOD
-// Maybe we should have more LODs at the low end?
-void LLRenderSphere::render(F32 pixel_area)
-{
- S32 level_of_detail;
+ gGL.begin(LLRender::TRIANGLES);
- if (pixel_area > 10000.f)
+ for (S32 lat_i = 0; lat_i < LATITUDE_SLICES; lat_i++)
{
- level_of_detail = 0;
- }
- else if (pixel_area > 800.f)
- {
- level_of_detail = 1;
- }
- else if (pixel_area > 100.f)
- {
- level_of_detail = 2;
- }
- else
- {
- level_of_detail = 3;
- }
- glCallList(mDList[level_of_detail]);
-}
-
+ for (S32 lon_i = 0; lon_i < LONGITUDE_SLICES; lon_i++)
+ {
+ gGL.vertex3fv(mSpherePoints[lat_i][lon_i].mV);
+ gGL.vertex3fv(mSpherePoints[lat_i][lon_i+1].mV);
+ gGL.vertex3fv(mSpherePoints[lat_i+1][lon_i].mV);
-void LLRenderSphere::render()
-{
- glCallList(mDList[0]);
+ gGL.vertex3fv(mSpherePoints[lat_i+1][lon_i].mV);
+ gGL.vertex3fv(mSpherePoints[lat_i][lon_i+1].mV);
+ gGL.vertex3fv(mSpherePoints[lat_i+1][lon_i+1].mV);
+ }
+ }
+ gGL.end();
}