lldrawpooltree.cpp

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#include "llviewerprecompiledheaders.h"

#include "lldrawpooltree.h"

#include "lldrawable.h"
#include "llface.h"
#include "llsky.h"
#include "llviewerwindow.h"
#include "llvotree.h"
#include "pipeline.h"
#include "llviewercamera.h"
#include "llglslshader.h"

S32 LLDrawPoolTree::sDiffTex = 0;

LLDrawPoolTree::LLDrawPoolTree(LLViewerImage *texturep) :
        LLFacePool(POOL_TREE),
        mTexturep(texturep)
{
        mTexturep->bind(0);
        mTexturep->setClamp(FALSE, FALSE);
}

LLDrawPool *LLDrawPoolTree::instancePool()
{
        return new LLDrawPoolTree(mTexturep);
}

void LLDrawPoolTree::prerender()
{
        mVertexShaderLevel = 0;
}

void LLDrawPoolTree::beginRenderPass(S32 pass)
{
        glEnableClientState(GL_VERTEX_ARRAY);
        glEnableClientState(GL_NORMAL_ARRAY);
        glEnableClientState(GL_TEXTURE_COORD_ARRAY);
        glAlphaFunc(GL_GREATER, 0.5f);
}

void LLDrawPoolTree::render(S32 pass)
{
        LLFastTimer t(LLFastTimer::FTM_RENDER_TREES);

        if (mDrawFace.empty())
        {
                return;
        }

        gPipeline.enableLightsDynamic(1.f);
        LLGLSPipelineAlpha gls_pipeline_alpha;
        LLOverrideFaceColor color(this, 1.f, 1.f, 1.f, 1.f);

        renderTree();
}

void LLDrawPoolTree::endRenderPass(S32 pass)
{
        glAlphaFunc(GL_GREATER, 0.01f);
        glDisableClientState(GL_NORMAL_ARRAY);
        glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}

void LLDrawPoolTree::renderForSelect()
{
        if (mDrawFace.empty())
        {
                return;
        }

        glEnableClientState (GL_VERTEX_ARRAY);
        glEnableClientState (GL_TEXTURE_COORD_ARRAY);
        
        LLOverrideFaceColor color(this, 1.f, 1.f, 1.f, 1.f);

        LLGLSObjectSelectAlpha gls_alpha;

        glBlendFunc(GL_ONE, GL_ZERO);
        glAlphaFunc(GL_GREATER, 0.5f);

        glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE,          GL_COMBINE_ARB);
        glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB_ARB,           GL_REPLACE);
        glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_ALPHA_ARB,         GL_MODULATE);

        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_RGB_ARB,           GL_PREVIOUS);
        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_RGB_ARB,          GL_SRC_COLOR);

        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE0_ALPHA_ARB,         GL_TEXTURE);
        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND0_ALPHA_ARB,        GL_SRC_ALPHA);

        glTexEnvi(GL_TEXTURE_ENV, GL_SOURCE1_ALPHA_ARB,         GL_PRIMARY_COLOR_ARB);
        glTexEnvi(GL_TEXTURE_ENV, GL_OPERAND1_ALPHA_ARB,        GL_SRC_ALPHA);

        renderTree(TRUE);

        glAlphaFunc(GL_GREATER, 0.01f);
        glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

        glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
        glDisableClientState (GL_TEXTURE_COORD_ARRAY);
}

void LLDrawPoolTree::renderTree(BOOL selecting)
{
        LLGLState normalize(GL_NORMALIZE, TRUE);
        
        // Bind the texture for this tree.
        LLViewerImage::bindTexture(mTexturep,sDiffTex);
        if (mTexturep)
        {
                if (mTexturep->getClampS()) {
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
                }
                if (mTexturep->getClampT()) {
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
                }
        }

        U32 indices_drawn = 0;

        glMatrixMode(GL_MODELVIEW);
        
        for (std::vector<LLFace*>::iterator iter = mDrawFace.begin();
                 iter != mDrawFace.end(); iter++)
        {
                LLFace *face = *iter;
                LLDrawable *drawablep = face->getDrawable();

                if (drawablep->isDead() || face->mVertexBuffer.isNull())
                {
                        continue;
                }

                face->mVertexBuffer->setBuffer(LLDrawPoolTree::VERTEX_DATA_MASK);
                U32* indicesp = (U32*) face->mVertexBuffer->getIndicesPointer();

                // Render each of the trees
                LLVOTree *treep = (LLVOTree *)drawablep->getVObj().get();

                LLColor4U color(255,255,255,255);

                if (!selecting || treep->mGLName != 0)
                {
                        if (selecting)
                        {
                                S32 name = treep->mGLName;
                                
                                color = LLColor4U((U8)(name >> 16), (U8)(name >> 8), (U8)name, 255);
                        }
                        
                        glPushMatrix();
                        
                        // Translate to tree base  HACK - adjustment in Z plants tree underground
                        const LLVector3 &pos_agent = treep->getPositionAgent();
                        glTranslatef(pos_agent.mV[VX], pos_agent.mV[VY], pos_agent.mV[VZ] - 0.1f);

                        // Rotate to tree position
                        F32 angle_radians, x, y, z;
                        treep->getRotation().getAngleAxis(&angle_radians, &x, &y, &z);
                        glRotatef(angle_radians * RAD_TO_DEG, x, y, z);

                        // Rotate and bend for current trunk/wind
                        // Note that trunk stiffness controls the amount of bend at the trunk as 
                        // opposed to the crown of the tree
                        // 
                        glRotatef(90.f, 0, 0, 1);
                        const F32 TRUNK_STIFF = 22.f;
                        glRotatef(treep->mTrunkBend.magVec()*TRUNK_STIFF, treep->mTrunkBend.mV[VX], treep->mTrunkBend.mV[VY], 0);

                        F32 radius = treep->getScale().magVec()*0.5f;
                        radius *= 0.1f;
                        glScalef(radius, radius, radius);

                        const F32 THRESH_ANGLE_FOR_BILLBOARD = 15.f;
                        const F32 BLEND_RANGE_FOR_BILLBOARD = 3.f;

                        F32 droop = treep->mDroop + 25.f*(1.f - treep->mTrunkBend.magVec());
                        
                        S32 stop_depth = 0;
                        F32 app_angle = treep->getAppAngle()*LLVOTree::sTreeFactor;
                        F32 alpha = 1.0;
                        S32 trunk_LOD = 0;

                        for (S32 j = 0; j < 4; j++)
                        {

                                if (app_angle > LLVOTree::sLODAngles[j])
                                {
                                        trunk_LOD = j;
                                        break;
                                }
                        } 

                        if (app_angle < (THRESH_ANGLE_FOR_BILLBOARD - BLEND_RANGE_FOR_BILLBOARD))
                        {
                                //
                                //  Draw only the billboard 
                                //
                                //  Only the billboard, can use closer to normal alpha func.
                                stop_depth = -1;
                                LLFacePool::LLOverrideFaceColor clr(this, color); 
                                indices_drawn += treep->drawBranchPipeline(indicesp, trunk_LOD, stop_depth, treep->mDepth, treep->mTrunkDepth, 1.0, treep->mTwist, droop, treep->mBranches, alpha);
                        }
                        else // if (app_angle > (THRESH_ANGLE_FOR_BILLBOARD + BLEND_RANGE_FOR_BILLBOARD))
                        {
                                //
                                //  Draw only the full geometry tree
                                //
                                //stop_depth = (app_angle < THRESH_ANGLE_FOR_RECURSION_REDUCTION);
                                LLFacePool::LLOverrideFaceColor clr(this, color); 
                                indices_drawn += treep->drawBranchPipeline(indicesp, trunk_LOD, stop_depth, treep->mDepth, treep->mTrunkDepth, 1.0, treep->mTwist, droop, treep->mBranches, alpha);
                        }
                        
                        glPopMatrix();
                }
        }

        if (mTexturep)
        {
                if (mTexturep->getClampS()) {
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
                }
                if (mTexturep->getClampT()) {
                        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
                }
        }

        addIndicesDrawn(indices_drawn);
}

BOOL LLDrawPoolTree::verify() const
{
/*      BOOL ok = TRUE;

        if (!ok)
        {
                printDebugInfo();
        }
        return ok;*/

        return TRUE;
}

LLViewerImage *LLDrawPoolTree::getTexture()
{
        return mTexturep;
}

LLViewerImage *LLDrawPoolTree::getDebugTexture()
{
        return mTexturep;
}


LLColor3 LLDrawPoolTree::getDebugColor() const
{
        return LLColor3(1.f, 0.f, 1.f);
}

S32 LLDrawPoolTree::getMaterialAttribIndex() 
{ 
        return gObjectSimpleProgram.mAttribute[LLShaderMgr::MATERIAL_COLOR];
}

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