sceneRenderState.cpp

Engine/source/scene/sceneRenderState.cpp

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Detailed Description

  1
  2//-----------------------------------------------------------------------------
  3// Copyright (c) 2012 GarageGames, LLC
  4//
  5// Permission is hereby granted, free of charge, to any person obtaining a copy
  6// of this software and associated documentation files (the "Software"), to
  7// deal in the Software without restriction, including without limitation the
  8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
  9// sell copies of the Software, and to permit persons to whom the Software is
 10// furnished to do so, subject to the following conditions:
 11//
 12// The above copyright notice and this permission notice shall be included in
 13// all copies or substantial portions of the Software.
 14//
 15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 21// IN THE SOFTWARE.
 22//-----------------------------------------------------------------------------
 23
 24#include "platform/platform.h"
 25#include "scene/sceneRenderState.h"
 26
 27#include "renderInstance/renderPassManager.h"
 28#include "math/util/matrixSet.h"
 29
 30//-----------------------------------------------------------------------------
 31
 32SceneRenderState::SceneRenderState( SceneManager* sceneManager,
 33                                    ScenePassType passType,
 34                                    const SceneCameraState& view,
 35                                    RenderPassManager* renderPass /* = NULL */,
 36                                    bool usePostEffects /* = true */ )
 37   :  mSceneManager( sceneManager ),
 38      mScenePassType( passType ),
 39      mRenderPass( renderPass ? renderPass : sceneManager->getDefaultRenderPass() ),
 40      mCullingState( sceneManager, view ),
 41      mUsePostEffects( usePostEffects ),
 42      mRenderLightmappedMeshes( true ),
 43      mRenderNonLightmappedMeshes( true ),
 44      mRenderArea( view.getFrustum().getBounds() ),
 45      mDisableAdvancedLightingBins( false ),
 46      mSceneRenderStyle( SRS_Standard ),
 47      mAmbientLightColor( sceneManager->getAmbientLightColor() )
 48{
 49   // Setup the default parameters for the screen metrics methods.
 50   mDiffuseCameraTransform = view.getHeadWorldViewMatrix();
 51   mDiffuseCameraTransform.inverse();
 52
 53   // The vector eye is the camera vector with its 
 54   // length normalized to 1 / zFar.
 55   getCameraTransform().getColumn( 1, &mVectorEye );
 56   mVectorEye.normalize( 1.0f / getFarPlane() );
 57
 58   // TODO: What about ortho modes?  Is near plane ok
 59   // or do i need to remove it... maybe ortho has a near
 60   // plane of 1 and it just works out?
 61
 62   const Frustum& frustum = view.getFrustum();
 63   const RectI& viewport = view.getViewport();
 64
 65   mWorldToScreenScale.set(   ( frustum.getNearDist() * viewport.extent.x ) / ( frustum.getNearRight() - frustum.getNearLeft() ),
 66                              ( frustum.getNearDist() * viewport.extent.y ) / ( frustum.getNearTop() - frustum.getNearBottom() ) );
 67
 68   // Assign shared matrix data to the render pass.
 69
 70   mRenderPass->assignSharedXform( RenderPassManager::View, view.getWorldViewMatrix() );
 71   mRenderPass->assignSharedXform( RenderPassManager::Projection, view.getProjectionMatrix() );
 72}
 73
 74//-----------------------------------------------------------------------------
 75
 76SceneRenderState::~SceneRenderState()
 77{
 78}
 79
 80//-----------------------------------------------------------------------------
 81
 82const MatrixF& SceneRenderState::getWorldViewMatrix() const
 83{
 84   return getRenderPass()->getMatrixSet().getWorldToCamera();
 85}
 86
 87//-----------------------------------------------------------------------------
 88
 89const MatrixF& SceneRenderState::getProjectionMatrix() const
 90{
 91   return getRenderPass()->getMatrixSet().getCameraToScreen();
 92}
 93
 94const MatrixF& SceneRenderState::getInvProjectionMatrix() const
 95{
 96   return getRenderPass()->getMatrixSet().getScreenToCamera();
 97}
 98
 99//-----------------------------------------------------------------------------
100
101void SceneRenderState::renderObjects( SceneObject** objects, U32 numObjects )
102{
103   // Let the objects batch their stuff.
104
105   PROFILE_START( SceneRenderState_prepRenderImages );
106   for( U32 i = 0; i < numObjects; ++ i )
107   {
108      SceneObject* object = objects[ i ];
109      object->prepRenderImage( this );
110   }
111
112   PROFILE_END();
113
114   // Render what the objects have batched.
115
116   getRenderPass()->renderPass( this );
117}
118