llvoground.cpp

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#include "llviewerprecompiledheaders.h"

#include "llvoground.h"
#include "lldrawpoolground.h"

#include "llviewercontrol.h"

#include "llagent.h"
#include "lldrawable.h"
#include "llface.h"
#include "llsky.h"
#include "llviewercamera.h"
#include "llviewerregion.h"
#include "pipeline.h"

LLVOGround::LLVOGround(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp)
:       LLStaticViewerObject(id, pcode, regionp)
{
        mbCanSelect = FALSE;
}


LLVOGround::~LLVOGround()
{
}

BOOL LLVOGround::idleUpdate(LLAgent &agent, LLWorld &world, const F64 &time)
{
        if (mDead || !(gPipeline.hasRenderType(LLPipeline::RENDER_TYPE_GROUND)))
        {
                return TRUE;
        }
        
        /*if (mDrawable)
        {
                gPipeline.markRebuild(mDrawable, LLDrawable::REBUILD_VOLUME, TRUE);
        }*/
        return TRUE;
}


void LLVOGround::updateTextures(LLAgent &agent)
{
}


LLDrawable *LLVOGround::createDrawable(LLPipeline *pipeline)
{
        pipeline->allocDrawable(this);
        mDrawable->setLit(FALSE);

        mDrawable->setRenderType(LLPipeline::RENDER_TYPE_GROUND);
        LLDrawPoolGround *poolp = (LLDrawPoolGround*) gPipeline.getPool(LLDrawPool::POOL_GROUND);

        mDrawable->addFace(poolp, NULL);

        return mDrawable;
}

BOOL LLVOGround::updateGeometry(LLDrawable *drawable)
{
        LLStrider<LLVector3> verticesp;
        LLStrider<LLVector3> normalsp;
        LLStrider<LLVector2> texCoordsp;
        LLStrider<U16> indicesp;
        S32 index_offset;
        LLFace *face;   

        LLDrawPoolGround *poolp = (LLDrawPoolGround*) gPipeline.getPool(LLDrawPool::POOL_GROUND);

        if (drawable->getNumFaces() < 1)
                drawable->addFace(poolp, NULL);
        face = drawable->getFace(0); 
                
        if (face->mVertexBuffer.isNull())
        {
                face->setSize(5, 12);
                face->mVertexBuffer = new LLVertexBuffer(LLDrawPoolGround::VERTEX_DATA_MASK, GL_STREAM_DRAW_ARB);
                face->mVertexBuffer->allocateBuffer(face->getGeomCount(), face->getIndicesCount(), TRUE);
                face->setGeomIndex(0);
                face->setIndicesIndex(0);
        }
        
        index_offset = face->getGeometry(verticesp,normalsp,texCoordsp, indicesp);
        if (-1 == index_offset)
        {
                return TRUE;
        }

        //
        //
        //
        LLVector3 at_dir = LLViewerCamera::getInstance()->getAtAxis();
        at_dir.mV[VZ] = 0.f;
        if (at_dir.normVec() < 0.01)
        {
                // We really don't care, as we're not looking anywhere near the horizon.
        }
        LLVector3 left_dir = LLViewerCamera::getInstance()->getLeftAxis();
        left_dir.mV[VZ] = 0.f;
        left_dir.normVec();

        // Our center top point
        LLColor4 ground_color = gSky.getFogColor();
        ground_color.mV[3] = 1.f;
        face->setFaceColor(ground_color);
        
        *(verticesp++)  = LLVector3(64, 64, 0);
        *(verticesp++)  = LLVector3(-64, 64, 0);
        *(verticesp++)  = LLVector3(-64, -64, 0);
        *(verticesp++)  = LLVector3(64, -64, 0);
        *(verticesp++)  = LLVector3(0, 0, -1024);
        
        
        // Triangles for each side
        *indicesp++ = index_offset + 0;
        *indicesp++ = index_offset + 1;
        *indicesp++ = index_offset + 4;

        *indicesp++ = index_offset + 1;
        *indicesp++ = index_offset + 2;
        *indicesp++ = index_offset + 4;

        *indicesp++ = index_offset + 2;
        *indicesp++ = index_offset + 3;
        *indicesp++ = index_offset + 4;

        *indicesp++ = index_offset + 3;
        *indicesp++ = index_offset + 0;
        *indicesp++ = index_offset + 4;

        *(texCoordsp++) = LLVector2(0.f, 0.f);
        *(texCoordsp++) = LLVector2(1.f, 0.f);
        *(texCoordsp++) = LLVector2(1.f, 1.f);
        *(texCoordsp++) = LLVector2(0.f, 1.f);
        *(texCoordsp++) = LLVector2(0.5f, 0.5f);
        
        face->mVertexBuffer->setBuffer(0);
        LLPipeline::sCompiles++;
        return TRUE;
}

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