/indra/newview/llvosurfacepatch.cpp
https://bitbucket.org/lindenlab/viewer-beta/ · C++ · 1108 lines · 846 code · 176 blank · 86 comment · 98 complexity · b05355290d673137284204883a987731 MD5 · raw file
- /**
- * @file llvosurfacepatch.cpp
- * @brief Viewer-object derived "surface patch", which is a piece of terrain
- *
- * $LicenseInfo:firstyear=2001&license=viewerlgpl$
- * Second Life Viewer Source Code
- * 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.
- *
- * 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.
- *
- * 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
- *
- * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
- * $/LicenseInfo$
- */
- #include "llviewerprecompiledheaders.h"
- #include "llvosurfacepatch.h"
- #include "lldrawpoolterrain.h"
- #include "lldrawable.h"
- #include "llface.h"
- #include "llprimitive.h"
- #include "llsky.h"
- #include "llsurfacepatch.h"
- #include "llsurface.h"
- #include "llviewerobjectlist.h"
- #include "llviewerregion.h"
- #include "llvlcomposition.h"
- #include "llvovolume.h"
- #include "pipeline.h"
- #include "llspatialpartition.h"
- F32 LLVOSurfacePatch::sLODFactor = 1.f;
- //============================================================================
- class LLVertexBufferTerrain : public LLVertexBuffer
- {
- public:
- LLVertexBufferTerrain() :
- LLVertexBuffer(MAP_VERTEX | MAP_NORMAL | MAP_TEXCOORD0 | MAP_TEXCOORD1 | MAP_COLOR, GL_DYNAMIC_DRAW_ARB)
- {
- //texture coordinates 2 and 3 exist, but use the same data as texture coordinate 1
- };
- // virtual
- void setupVertexBuffer(U32 data_mask)
- {
- if (LLGLSLShader::sNoFixedFunction)
- { //just use default if shaders are in play
- LLVertexBuffer::setupVertexBuffer(data_mask & ~(MAP_TEXCOORD2 | MAP_TEXCOORD3));
- return;
- }
- U8* base = useVBOs() ? (U8*) mAlignedOffset : mMappedData;
- //assume tex coords 2 and 3 are present
- U32 type_mask = mTypeMask | MAP_TEXCOORD2 | MAP_TEXCOORD3;
- if ((data_mask & type_mask) != data_mask)
- {
- llerrs << "LLVertexBuffer::setupVertexBuffer missing required components for supplied data mask." << llendl;
- }
- if (data_mask & MAP_NORMAL)
- {
- glNormalPointer(GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_NORMAL], (void*)(base + mOffsets[TYPE_NORMAL]));
- }
- if (data_mask & MAP_TEXCOORD3)
- { //substitute tex coord 0 for tex coord 3
- glClientActiveTextureARB(GL_TEXTURE3_ARB);
- glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD0], (void*)(base + mOffsets[TYPE_TEXCOORD0]));
- glClientActiveTextureARB(GL_TEXTURE0_ARB);
- }
- if (data_mask & MAP_TEXCOORD2)
- { //substitute tex coord 0 for tex coord 2
- glClientActiveTextureARB(GL_TEXTURE2_ARB);
- glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD0], (void*)(base + mOffsets[TYPE_TEXCOORD0]));
- glClientActiveTextureARB(GL_TEXTURE0_ARB);
- }
- if (data_mask & MAP_TEXCOORD1)
- {
- glClientActiveTextureARB(GL_TEXTURE1_ARB);
- glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD1], (void*)(base + mOffsets[TYPE_TEXCOORD1]));
- glClientActiveTextureARB(GL_TEXTURE0_ARB);
- }
- if (data_mask & MAP_BINORMAL)
- {
- glClientActiveTextureARB(GL_TEXTURE2_ARB);
- glTexCoordPointer(3,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_BINORMAL], (void*)(base + mOffsets[TYPE_BINORMAL]));
- glClientActiveTextureARB(GL_TEXTURE0_ARB);
- }
- if (data_mask & MAP_TEXCOORD0)
- {
- glTexCoordPointer(2,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_TEXCOORD0], (void*)(base + mOffsets[TYPE_TEXCOORD0]));
- }
- if (data_mask & MAP_COLOR)
- {
- glColorPointer(4, GL_UNSIGNED_BYTE, LLVertexBuffer::sTypeSize[TYPE_COLOR], (void*)(base + mOffsets[TYPE_COLOR]));
- }
-
- if (data_mask & MAP_VERTEX)
- {
- glVertexPointer(3,GL_FLOAT, LLVertexBuffer::sTypeSize[TYPE_VERTEX], (void*)(base + 0));
- }
- }
- };
- //============================================================================
- LLVOSurfacePatch::LLVOSurfacePatch(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp)
- : LLStaticViewerObject(id, pcode, regionp),
- mDirtiedPatch(FALSE),
- mPool(NULL),
- mBaseComp(0),
- mPatchp(NULL),
- mDirtyTexture(FALSE),
- mDirtyTerrain(FALSE),
- mLastNorthStride(0),
- mLastEastStride(0),
- mLastStride(0),
- mLastLength(0)
- {
- // Terrain must draw during selection passes so it can block objects behind it.
- mbCanSelect = TRUE;
- setScale(LLVector3(16.f, 16.f, 16.f)); // Hack for setting scale for bounding boxes/visibility.
- }
- LLVOSurfacePatch::~LLVOSurfacePatch()
- {
- mPatchp = NULL;
- }
- void LLVOSurfacePatch::markDead()
- {
- if (mPatchp)
- {
- mPatchp->clearVObj();
- mPatchp = NULL;
- }
- LLViewerObject::markDead();
- }
- BOOL LLVOSurfacePatch::isActive() const
- {
- return FALSE;
- }
- void LLVOSurfacePatch::setPixelAreaAndAngle(LLAgent &agent)
- {
- mAppAngle = 50;
- mPixelArea = 500*500;
- }
- void LLVOSurfacePatch::updateTextures()
- {
- }
- LLFacePool *LLVOSurfacePatch::getPool()
- {
- mPool = (LLDrawPoolTerrain*) gPipeline.getPool(LLDrawPool::POOL_TERRAIN, mPatchp->getSurface()->getSTexture());
- return mPool;
- }
- LLDrawable *LLVOSurfacePatch::createDrawable(LLPipeline *pipeline)
- {
- pipeline->allocDrawable(this);
- mDrawable->setRenderType(LLPipeline::RENDER_TYPE_TERRAIN);
-
- mBaseComp = llfloor(mPatchp->getMinComposition());
- S32 min_comp, max_comp, range;
- min_comp = llfloor(mPatchp->getMinComposition());
- max_comp = llceil(mPatchp->getMaxComposition());
- range = (max_comp - min_comp);
- range++;
- if (range > 3)
- {
- if ((mPatchp->getMinComposition() - min_comp) > (max_comp - mPatchp->getMaxComposition()))
- {
- // The top side runs over more
- mBaseComp++;
- }
- range = 3;
- }
- LLFacePool *poolp = getPool();
- mDrawable->addFace(poolp, NULL);
- return mDrawable;
- }
- static LLFastTimer::DeclareTimer FTM_UPDATE_TERRAIN("Update Terrain");
- void LLVOSurfacePatch::updateGL()
- {
- if (mPatchp)
- {
- mPatchp->updateGL();
- }
- }
- BOOL LLVOSurfacePatch::updateGeometry(LLDrawable *drawable)
- {
- LLFastTimer ftm(FTM_UPDATE_TERRAIN);
- dirtySpatialGroup(TRUE);
-
- S32 min_comp, max_comp, range;
- min_comp = lltrunc(mPatchp->getMinComposition());
- max_comp = lltrunc(ceil(mPatchp->getMaxComposition()));
- range = (max_comp - min_comp);
- range++;
- S32 new_base_comp = lltrunc(mPatchp->getMinComposition());
- if (range > 3)
- {
- if ((mPatchp->getMinComposition() - min_comp) > (max_comp - mPatchp->getMaxComposition()))
- {
- // The top side runs over more
- new_base_comp++;
- }
- range = 3;
- }
- // Pick the two closest detail textures for this patch...
- // Then create the draw pool for it.
- // Actually, should get the average composition instead of the center.
- mBaseComp = new_base_comp;
- //////////////////////////
- //
- // Figure out the strides
- //
- //
- U32 patch_width, render_stride, north_stride, east_stride, length;
- render_stride = mPatchp->getRenderStride();
- patch_width = mPatchp->getSurface()->getGridsPerPatchEdge();
- length = patch_width / render_stride;
- if (mPatchp->getNeighborPatch(NORTH))
- {
- north_stride = mPatchp->getNeighborPatch(NORTH)->getRenderStride();
- }
- else
- {
- north_stride = render_stride;
- }
- if (mPatchp->getNeighborPatch(EAST))
- {
- east_stride = mPatchp->getNeighborPatch(EAST)->getRenderStride();
- }
- else
- {
- east_stride = render_stride;
- }
- mLastLength = length;
- mLastStride = render_stride;
- mLastNorthStride = north_stride;
- mLastEastStride = east_stride;
- return TRUE;
- }
- void LLVOSurfacePatch::updateFaceSize(S32 idx)
- {
- if (idx != 0)
- {
- llwarns << "Terrain partition requested invalid face!!!" << llendl;
- return;
- }
- LLFace* facep = mDrawable->getFace(idx);
- S32 num_vertices = 0;
- S32 num_indices = 0;
-
- if (mLastStride)
- {
- getGeomSizesMain(mLastStride, num_vertices, num_indices);
- getGeomSizesNorth(mLastStride, mLastNorthStride, num_vertices, num_indices);
- getGeomSizesEast(mLastStride, mLastEastStride, num_vertices, num_indices);
- }
- facep->setSize(num_vertices, num_indices);
- }
- BOOL LLVOSurfacePatch::updateLOD()
- {
- return TRUE;
- }
- void LLVOSurfacePatch::getGeometry(LLStrider<LLVector3> &verticesp,
- LLStrider<LLVector3> &normalsp,
- LLStrider<LLVector2> &texCoords0p,
- LLStrider<LLVector2> &texCoords1p,
- LLStrider<U16> &indicesp)
- {
- LLFace* facep = mDrawable->getFace(0);
- U32 index_offset = facep->getGeomIndex();
- updateMainGeometry(facep,
- verticesp,
- normalsp,
- texCoords0p,
- texCoords1p,
- indicesp,
- index_offset);
- updateNorthGeometry(facep,
- verticesp,
- normalsp,
- texCoords0p,
- texCoords1p,
- indicesp,
- index_offset);
- updateEastGeometry(facep,
- verticesp,
- normalsp,
- texCoords0p,
- texCoords1p,
- indicesp,
- index_offset);
- }
- void LLVOSurfacePatch::updateMainGeometry(LLFace *facep,
- LLStrider<LLVector3> &verticesp,
- LLStrider<LLVector3> &normalsp,
- LLStrider<LLVector2> &texCoords0p,
- LLStrider<LLVector2> &texCoords1p,
- LLStrider<U16> &indicesp,
- U32 &index_offset)
- {
- S32 i, j, x, y;
- U32 patch_size, render_stride;
- S32 num_vertices, num_indices;
- U32 index;
- llassert(mLastStride > 0);
- render_stride = mLastStride;
- patch_size = mPatchp->getSurface()->getGridsPerPatchEdge();
- S32 vert_size = patch_size / render_stride;
- ///////////////////////////
- //
- // Render the main patch
- //
- //
- num_vertices = 0;
- num_indices = 0;
- // First, figure out how many vertices we need...
- getGeomSizesMain(render_stride, num_vertices, num_indices);
- if (num_vertices > 0)
- {
- facep->mCenterAgent = mPatchp->getPointAgent(8, 8);
- // Generate patch points first
- for (j = 0; j < vert_size; j++)
- {
- for (i = 0; i < vert_size; i++)
- {
- x = i * render_stride;
- y = j * render_stride;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- }
- }
- for (j = 0; j < (vert_size - 1); j++)
- {
- if (j % 2)
- {
- for (i = (vert_size - 1); i > 0; i--)
- {
- index = (i - 1)+ j*vert_size;
- *(indicesp++) = index_offset + index;
- index = i + (j+1)*vert_size;
- *(indicesp++) = index_offset + index;
- index = (i - 1) + (j+1)*vert_size;
- *(indicesp++) = index_offset + index;
- index = (i - 1) + j*vert_size;
- *(indicesp++) = index_offset + index;
- index = i + j*vert_size;
- *(indicesp++) = index_offset + index;
- index = i + (j+1)*vert_size;
- *(indicesp++) = index_offset + index;
- }
- }
- else
- {
- for (i = 0; i < (vert_size - 1); i++)
- {
- index = i + j*vert_size;
- *(indicesp++) = index_offset + index;
- index = (i + 1) + (j+1)*vert_size;
- *(indicesp++) = index_offset + index;
- index = i + (j+1)*vert_size;
- *(indicesp++) = index_offset + index;
- index = i + j*vert_size;
- *(indicesp++) = index_offset + index;
- index = (i + 1) + j*vert_size;
- *(indicesp++) = index_offset + index;
- index = (i + 1) + (j + 1)*vert_size;
- *(indicesp++) = index_offset + index;
- }
- }
- }
- }
- index_offset += num_vertices;
- }
- void LLVOSurfacePatch::updateNorthGeometry(LLFace *facep,
- LLStrider<LLVector3> &verticesp,
- LLStrider<LLVector3> &normalsp,
- LLStrider<LLVector2> &texCoords0p,
- LLStrider<LLVector2> &texCoords1p,
- LLStrider<U16> &indicesp,
- U32 &index_offset)
- {
- S32 vertex_count = 0;
- S32 i, x, y;
- S32 num_vertices, num_indices;
- U32 render_stride = mLastStride;
- S32 patch_size = mPatchp->getSurface()->getGridsPerPatchEdge();
- S32 length = patch_size / render_stride;
- S32 half_length = length / 2;
- U32 north_stride = mLastNorthStride;
-
- ///////////////////////////
- //
- // Render the north strip
- //
- //
- // Stride lengths are the same
- if (north_stride == render_stride)
- {
- num_vertices = 2 * length + 1;
- num_indices = length * 6 - 3;
- facep->mCenterAgent = (mPatchp->getPointAgent(8, 15) + mPatchp->getPointAgent(8, 16))*0.5f;
- // Main patch
- for (i = 0; i < length; i++)
- {
- x = i * render_stride;
- y = 16 - render_stride;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- vertex_count++;
- }
- // North patch
- for (i = 0; i <= length; i++)
- {
- x = i * render_stride;
- y = 16;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- vertex_count++;
- }
- for (i = 0; i < length; i++)
- {
- // Generate indices
- *(indicesp++) = index_offset + i;
- *(indicesp++) = index_offset + length + i + 1;
- *(indicesp++) = index_offset + length + i;
- if (i != length - 1)
- {
- *(indicesp++) = index_offset + i;
- *(indicesp++) = index_offset + i + 1;
- *(indicesp++) = index_offset + length + i + 1;
- }
- }
- }
- else if (north_stride > render_stride)
- {
- // North stride is longer (has less vertices)
- num_vertices = length + length/2 + 1;
- num_indices = half_length*9 - 3;
- facep->mCenterAgent = (mPatchp->getPointAgent(7, 15) + mPatchp->getPointAgent(8, 16))*0.5f;
- // Iterate through this patch's points
- for (i = 0; i < length; i++)
- {
- x = i * render_stride;
- y = 16 - render_stride;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- vertex_count++;
- }
- // Iterate through the north patch's points
- for (i = 0; i <= length; i+=2)
- {
- x = i * render_stride;
- y = 16;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- vertex_count++;
- }
- for (i = 0; i < length; i++)
- {
- if (!(i % 2))
- {
- *(indicesp++) = index_offset + i;
- *(indicesp++) = index_offset + i + 1;
- *(indicesp++) = index_offset + length + (i/2);
- *(indicesp++) = index_offset + i + 1;
- *(indicesp++) = index_offset + length + (i/2) + 1;
- *(indicesp++) = index_offset + length + (i/2);
- }
- else if (i < (length - 1))
- {
- *(indicesp++) = index_offset + i;
- *(indicesp++) = index_offset + i + 1;
- *(indicesp++) = index_offset + length + (i/2) + 1;
- }
- }
- }
- else
- {
- // North stride is shorter (more vertices)
- length = patch_size / north_stride;
- half_length = length / 2;
- num_vertices = length + half_length + 1;
- num_indices = 9*half_length - 3;
- facep->mCenterAgent = (mPatchp->getPointAgent(15, 7) + mPatchp->getPointAgent(16, 8))*0.5f;
- // Iterate through this patch's points
- for (i = 0; i < length; i+=2)
- {
- x = i * north_stride;
- y = 16 - render_stride;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- vertex_count++;
- }
- // Iterate through the north patch's points
- for (i = 0; i <= length; i++)
- {
- x = i * north_stride;
- y = 16;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- vertex_count++;
- }
- for (i = 0; i < length; i++)
- {
- if (!(i%2))
- {
- *(indicesp++) = index_offset + half_length + i;
- *(indicesp++) = index_offset + i/2;
- *(indicesp++) = index_offset + half_length + i + 1;
- }
- else if (i < (length - 2))
- {
- *(indicesp++) = index_offset + half_length + i;
- *(indicesp++) = index_offset + i/2;
- *(indicesp++) = index_offset + i/2 + 1;
- *(indicesp++) = index_offset + half_length + i;
- *(indicesp++) = index_offset + i/2 + 1;
- *(indicesp++) = index_offset + half_length + i + 1;
- }
- else
- {
- *(indicesp++) = index_offset + half_length + i;
- *(indicesp++) = index_offset + i/2;
- *(indicesp++) = index_offset + half_length + i + 1;
- }
- }
- }
- index_offset += num_vertices;
- }
- void LLVOSurfacePatch::updateEastGeometry(LLFace *facep,
- LLStrider<LLVector3> &verticesp,
- LLStrider<LLVector3> &normalsp,
- LLStrider<LLVector2> &texCoords0p,
- LLStrider<LLVector2> &texCoords1p,
- LLStrider<U16> &indicesp,
- U32 &index_offset)
- {
- S32 i, x, y;
- S32 num_vertices, num_indices;
- U32 render_stride = mLastStride;
- S32 patch_size = mPatchp->getSurface()->getGridsPerPatchEdge();
- S32 length = patch_size / render_stride;
- S32 half_length = length / 2;
- U32 east_stride = mLastEastStride;
- // Stride lengths are the same
- if (east_stride == render_stride)
- {
- num_vertices = 2 * length + 1;
- num_indices = length * 6 - 3;
- facep->mCenterAgent = (mPatchp->getPointAgent(8, 15) + mPatchp->getPointAgent(8, 16))*0.5f;
- // Main patch
- for (i = 0; i < length; i++)
- {
- x = 16 - render_stride;
- y = i * render_stride;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- }
- // East patch
- for (i = 0; i <= length; i++)
- {
- x = 16;
- y = i * render_stride;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- }
- for (i = 0; i < length; i++)
- {
- // Generate indices
- *(indicesp++) = index_offset + i;
- *(indicesp++) = index_offset + length + i;
- *(indicesp++) = index_offset + length + i + 1;
- if (i != length - 1)
- {
- *(indicesp++) = index_offset + i;
- *(indicesp++) = index_offset + length + i + 1;
- *(indicesp++) = index_offset + i + 1;
- }
- }
- }
- else if (east_stride > render_stride)
- {
- // East stride is longer (has less vertices)
- num_vertices = length + half_length + 1;
- num_indices = half_length*9 - 3;
- facep->mCenterAgent = (mPatchp->getPointAgent(7, 15) + mPatchp->getPointAgent(8, 16))*0.5f;
- // Iterate through this patch's points
- for (i = 0; i < length; i++)
- {
- x = 16 - render_stride;
- y = i * render_stride;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- }
- // Iterate through the east patch's points
- for (i = 0; i <= length; i+=2)
- {
- x = 16;
- y = i * render_stride;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- }
- for (i = 0; i < length; i++)
- {
- if (!(i % 2))
- {
- *(indicesp++) = index_offset + i;
- *(indicesp++) = index_offset + length + (i/2);
- *(indicesp++) = index_offset + i + 1;
- *(indicesp++) = index_offset + i + 1;
- *(indicesp++) = index_offset + length + (i/2);
- *(indicesp++) = index_offset + length + (i/2) + 1;
- }
- else if (i < (length - 1))
- {
- *(indicesp++) = index_offset + i;
- *(indicesp++) = index_offset + length + (i/2) + 1;
- *(indicesp++) = index_offset + i + 1;
- }
- }
- }
- else
- {
- // East stride is shorter (more vertices)
- length = patch_size / east_stride;
- half_length = length / 2;
- num_vertices = length + length/2 + 1;
- num_indices = 9*(length/2) - 3;
- facep->mCenterAgent = (mPatchp->getPointAgent(15, 7) + mPatchp->getPointAgent(16, 8))*0.5f;
- // Iterate through this patch's points
- for (i = 0; i < length; i+=2)
- {
- x = 16 - render_stride;
- y = i * east_stride;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- }
- // Iterate through the east patch's points
- for (i = 0; i <= length; i++)
- {
- x = 16;
- y = i * east_stride;
- mPatchp->eval(x, y, render_stride, verticesp.get(), normalsp.get(), texCoords0p.get(), texCoords1p.get());
- verticesp++;
- normalsp++;
- texCoords0p++;
- texCoords1p++;
- }
- for (i = 0; i < length; i++)
- {
- if (!(i%2))
- {
- *(indicesp++) = index_offset + half_length + i;
- *(indicesp++) = index_offset + half_length + i + 1;
- *(indicesp++) = index_offset + i/2;
- }
- else if (i < (length - 2))
- {
- *(indicesp++) = index_offset + half_length + i;
- *(indicesp++) = index_offset + i/2 + 1;
- *(indicesp++) = index_offset + i/2;
- *(indicesp++) = index_offset + half_length + i;
- *(indicesp++) = index_offset + half_length + i + 1;
- *(indicesp++) = index_offset + i/2 + 1;
- }
- else
- {
- *(indicesp++) = index_offset + half_length + i;
- *(indicesp++) = index_offset + half_length + i + 1;
- *(indicesp++) = index_offset + i/2;
- }
- }
- }
- index_offset += num_vertices;
- }
- void LLVOSurfacePatch::setPatch(LLSurfacePatch *patchp)
- {
- mPatchp = patchp;
- dirtyPatch();
- };
- void LLVOSurfacePatch::dirtyPatch()
- {
- mDirtiedPatch = TRUE;
- dirtyGeom();
- mDirtyTerrain = TRUE;
- LLVector3 center = mPatchp->getCenterRegion();
- LLSurface *surfacep = mPatchp->getSurface();
- setPositionRegion(center);
- F32 scale_factor = surfacep->getGridsPerPatchEdge() * surfacep->getMetersPerGrid();
- setScale(LLVector3(scale_factor, scale_factor, mPatchp->getMaxZ() - mPatchp->getMinZ()));
- }
- void LLVOSurfacePatch::dirtyGeom()
- {
- if (mDrawable)
- {
- gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_ALL, TRUE);
- mDrawable->getFace(0)->setVertexBuffer(NULL);
- mDrawable->movePartition();
- }
- }
- void LLVOSurfacePatch::getGeomSizesMain(const S32 stride, S32 &num_vertices, S32 &num_indices)
- {
- S32 patch_size = mPatchp->getSurface()->getGridsPerPatchEdge();
- // First, figure out how many vertices we need...
- S32 vert_size = patch_size / stride;
- if (vert_size >= 2)
- {
- num_vertices += vert_size * vert_size;
- num_indices += 6 * (vert_size - 1)*(vert_size - 1);
- }
- }
- void LLVOSurfacePatch::getGeomSizesNorth(const S32 stride, const S32 north_stride,
- S32 &num_vertices, S32 &num_indices)
- {
- S32 patch_size = mPatchp->getSurface()->getGridsPerPatchEdge();
- S32 length = patch_size / stride;
- // Stride lengths are the same
- if (north_stride == stride)
- {
- num_vertices += 2 * length + 1;
- num_indices += length * 6 - 3;
- }
- else if (north_stride > stride)
- {
- // North stride is longer (has less vertices)
- num_vertices += length + (length/2) + 1;
- num_indices += (length/2)*9 - 3;
- }
- else
- {
- // North stride is shorter (more vertices)
- length = patch_size / north_stride;
- num_vertices += length + (length/2) + 1;
- num_indices += 9*(length/2) - 3;
- }
- }
- void LLVOSurfacePatch::getGeomSizesEast(const S32 stride, const S32 east_stride,
- S32 &num_vertices, S32 &num_indices)
- {
- S32 patch_size = mPatchp->getSurface()->getGridsPerPatchEdge();
- S32 length = patch_size / stride;
- // Stride lengths are the same
- if (east_stride == stride)
- {
- num_vertices += 2 * length + 1;
- num_indices += length * 6 - 3;
- }
- else if (east_stride > stride)
- {
- // East stride is longer (has less vertices)
- num_vertices += length + (length/2) + 1;
- num_indices += (length/2)*9 - 3;
- }
- else
- {
- // East stride is shorter (more vertices)
- length = patch_size / east_stride;
- num_vertices += length + (length/2) + 1;
- num_indices += 9*(length/2) - 3;
- }
- }
- BOOL LLVOSurfacePatch::lineSegmentIntersect(const LLVector3& start, const LLVector3& end, S32 face, BOOL pick_transparent, S32 *face_hitp,
- LLVector3* intersection,LLVector2* tex_coord, LLVector3* normal, LLVector3* bi_normal)
-
- {
- if (!lineSegmentBoundingBox(start, end))
- {
- return FALSE;
- }
- LLVector3 delta = end-start;
-
- LLVector3 pdelta = delta;
- pdelta.mV[2] = 0;
- F32 plength = pdelta.length();
-
- F32 tdelta = 1.f/plength;
- LLVector3 origin = start - mRegionp->getOriginAgent();
- if (mRegionp->getLandHeightRegion(origin) > origin.mV[2])
- {
- //origin is under ground, treat as no intersection
- return FALSE;
- }
- //step one meter at a time until intersection point found
- //VECTORIZE THIS
- const LLVector4a* exta = mDrawable->getSpatialExtents();
- LLVector3 ext[2];
- ext[0].set(exta[0].getF32ptr());
- ext[1].set(exta[1].getF32ptr());
- F32 rad = (delta*tdelta).magVecSquared();
- F32 t = 0.f;
- while ( t <= 1.f)
- {
- LLVector3 sample = origin + delta*t;
-
- if (AABBSphereIntersectR2(ext[0], ext[1], sample+mRegionp->getOriginAgent(), rad))
- {
- F32 height = mRegionp->getLandHeightRegion(sample);
- if (height > sample.mV[2])
- { //ray went below ground, positive intersection
- //quick and dirty binary search to get impact point
- tdelta = -tdelta*0.5f;
- F32 err_dist = 0.001f;
- F32 dist = fabsf(sample.mV[2] - height);
- while (dist > err_dist && tdelta*tdelta > 0.0f)
- {
- t += tdelta;
- sample = origin+delta*t;
- height = mRegionp->getLandHeightRegion(sample);
- if ((tdelta < 0 && height < sample.mV[2]) ||
- (height > sample.mV[2] && tdelta > 0))
- { //jumped over intersection point, go back
- tdelta = -tdelta;
- }
- tdelta *= 0.5f;
- dist = fabsf(sample.mV[2] - height);
- }
- if (intersection)
- {
- F32 height = mRegionp->getLandHeightRegion(sample);
- if (fabsf(sample.mV[2]-height) < delta.length()*tdelta)
- {
- sample.mV[2] = mRegionp->getLandHeightRegion(sample);
- }
- *intersection = sample + mRegionp->getOriginAgent();
- }
- if (normal)
- {
- *normal = mRegionp->getLand().resolveNormalGlobal(mRegionp->getPosGlobalFromRegion(sample));
- }
- return TRUE;
- }
- }
- t += tdelta;
- if (t > 1 && t < 1.f+tdelta*0.99f)
- { //make sure end point is checked (saves vertical lines coming up negative)
- t = 1.f;
- }
- }
- return FALSE;
- }
- void LLVOSurfacePatch::updateSpatialExtents(LLVector4a& newMin, LLVector4a &newMax)
- {
- LLVector3 posAgent = getPositionAgent();
- LLVector3 scale = getScale();
- //make z-axis scale at least 1 to avoid shadow artifacts on totally flat land
- scale.mV[VZ] = llmax(scale.mV[VZ], 1.f);
- newMin.load3( (posAgent-scale*0.5f).mV); // Changing to 2.f makes the culling a -little- better, but still wrong
- newMax.load3( (posAgent+scale*0.5f).mV);
- LLVector4a pos;
- pos.setAdd(newMin,newMax);
- pos.mul(0.5f);
- mDrawable->setPositionGroup(pos);
- }
- U32 LLVOSurfacePatch::getPartitionType() const
- {
- return LLViewerRegion::PARTITION_TERRAIN;
- }
- LLTerrainPartition::LLTerrainPartition()
- : LLSpatialPartition(LLDrawPoolTerrain::VERTEX_DATA_MASK, FALSE, GL_DYNAMIC_DRAW_ARB)
- {
- mOcclusionEnabled = FALSE;
- mInfiniteFarClip = TRUE;
- mDrawableType = LLPipeline::RENDER_TYPE_TERRAIN;
- mPartitionType = LLViewerRegion::PARTITION_TERRAIN;
- }
- LLVertexBuffer* LLTerrainPartition::createVertexBuffer(U32 type_mask, U32 usage)
- {
- return new LLVertexBufferTerrain();
- }
- static LLFastTimer::DeclareTimer FTM_REBUILD_TERRAIN_VB("Terrain VB");
- void LLTerrainPartition::getGeometry(LLSpatialGroup* group)
- {
- LLFastTimer ftm(FTM_REBUILD_TERRAIN_VB);
- LLVertexBuffer* buffer = group->mVertexBuffer;
- //get vertex buffer striders
- LLStrider<LLVector3> vertices;
- LLStrider<LLVector3> normals;
- LLStrider<LLVector2> texcoords2;
- LLStrider<LLVector2> texcoords;
- LLStrider<U16> indices;
- llassert_always(buffer->getVertexStrider(vertices));
- llassert_always(buffer->getNormalStrider(normals));
- llassert_always(buffer->getTexCoord0Strider(texcoords));
- llassert_always(buffer->getTexCoord1Strider(texcoords2));
- llassert_always(buffer->getIndexStrider(indices));
- U32 indices_index = 0;
- U32 index_offset = 0;
- for (std::vector<LLFace*>::iterator i = mFaceList.begin(); i != mFaceList.end(); ++i)
- {
- LLFace* facep = *i;
- facep->setIndicesIndex(indices_index);
- facep->setGeomIndex(index_offset);
- facep->setVertexBuffer(buffer);
- LLVOSurfacePatch* patchp = (LLVOSurfacePatch*) facep->getViewerObject();
- patchp->getGeometry(vertices, normals, texcoords, texcoords2, indices);
- indices_index += facep->getIndicesCount();
- index_offset += facep->getGeomCount();
- }
- buffer->flush();
- mFaceList.clear();
- }