ogre render to texture 设置透明
这个问题其实就是 rtt+texture设置透明
代码如下
代码
Ogre::TexturePtr rtt_texture
=
Ogre::TextureManager::getSingleton().createManual(
"
RttTex
"
, Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
Ogre::TEX_TYPE_2D, mWindow
->
getWidth(), mWindow
->
getHeight(),
0
, Ogre::PF_R8G8B8, Ogre::TU_RENDERTARGET);
Ogre::RenderTexture
*
renderTexture
=
rtt_texture
->
getBuffer()
->
getRenderTarget();
renderTexture
->
addViewport(mCamera);
renderTexture
->
getViewport(
0
)
->
setClearEveryFrame(
true
);
renderTexture
->
getViewport(
0
)
->
setBackgroundColour(Ogre::ColourValue::Black);
renderTexture
->
getViewport(
0
)
->
setOverlaysEnabled(
false
);
renderTexture
->
update();
renderTexture
->
writeContentsToFile(
"
start.png
"
);
mMiniScreen
=
new
Ogre::Rectangle2D(
true
);
mMiniScreen
->
setCorners(
0.5f
,
-
0.5f
,
1.0f
,
-
1.0f
);
mMiniScreen
->
setBoundingBox(Ogre::AxisAlignedBox(
-
100000.0f
*
Ogre::Vector3::UNIT_SCALE,
100000.0f
*
Ogre::Vector3::UNIT_SCALE));
Ogre::SceneNode
*
miniScreenNode
=
mSceneMgr
->
getRootSceneNode()
->
createChildSceneNode(
"
MiniScreenNode
"
);
miniScreenNode
->
attachObject(mMiniScreen);
Ogre::MaterialPtr renderMaterial
=
Ogre::MaterialManager::getSingleton().create(
"
RttMat
"
, Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
Ogre::Technique
*
matTechnique
=
renderMaterial
->
createTechnique();
matTechnique
->
createPass();
renderMaterial
->
getTechnique(
0
)
->
getPass(
0
)
->
setLightingEnabled(
false
);
renderMaterial
->
getTechnique(
0
)
->
getPass(
0
)
->
createTextureUnitState(
"
RttTex
"
);
renderMaterial
->
getTechnique(
0
)
->
getPass(
0
)
->
setSceneBlending(Ogre::SBT_TRANSPARENT_ALPHA);
//
SBT_TRANSPARENT_COLOUR
//
material->getTechnique(0)->getPass(0)->setTransparentSortingEnabled(true);
renderMaterial
->
getTechnique(
0
)
->
getPass(
0
)
->
getTextureUnitState(
0
)
->
setAlphaOperation(Ogre::LBX_MODULATE, Ogre::LBS_TEXTURE, Ogre::LBS_MANUAL,
1.0
,
0.1
);
//
0.8为透明度
mMiniScreen
->
setMaterial(
"
RttMat
"
);
代码
Ogre::TexturePtr rtt_texture
=
Ogre::TextureManager::getSingleton().createManual(
"
RttTex
"
, Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
Ogre::TEX_TYPE_2D, mWindow
->
getWidth(), mWindow
->
getHeight(),
0
, Ogre::PF_R8G8B8, Ogre::TU_RENDERTARGET);
Ogre::RenderTexture
*
renderTexture
=
rtt_texture
->
getBuffer()
->
getRenderTarget();
renderTexture
->
addViewport(mCamera);
renderTexture
->
getViewport(
0
)
->
setClearEveryFrame(
true
);
renderTexture
->
getViewport(
0
)
->
setBackgroundColour(Ogre::ColourValue::Black);
renderTexture
->
getViewport(
0
)
->
setOverlaysEnabled(
false
);
renderTexture
->
update();
renderTexture
->
writeContentsToFile(
"
start.png
"
);
mMiniScreen
=
new
Ogre::Rectangle2D(
true
);
mMiniScreen
->
setCorners(
0.5f
,
-
0.5f
,
1.0f
,
-
1.0f
);
mMiniScreen
->
setBoundingBox(Ogre::AxisAlignedBox(
-
100000.0f
*
Ogre::Vector3::UNIT_SCALE,
100000.0f
*
Ogre::Vector3::UNIT_SCALE));
Ogre::SceneNode
*
miniScreenNode
=
mSceneMgr
->
getRootSceneNode()
->
createChildSceneNode(
"
MiniScreenNode
"
);
miniScreenNode
->
attachObject(mMiniScreen);
Ogre::MaterialPtr renderMaterial
=
Ogre::MaterialManager::getSingleton().create(
"
RttMat
"
, Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
Ogre::Technique
*
matTechnique
=
renderMaterial
->
createTechnique();
matTechnique
->
createPass();
renderMaterial
->
getTechnique(
0
)
->
getPass(
0
)
->
setLightingEnabled(
false
);
renderMaterial
->
getTechnique(
0
)
->
getPass(
0
)
->
createTextureUnitState(
"
RttTex
"
);
renderMaterial
->
getTechnique(
0
)
->
getPass(
0
)
->
setSceneBlending(Ogre::SBT_TRANSPARENT_ALPHA);
//
SBT_TRANSPARENT_COLOUR
//
material->getTechnique(0)->getPass(0)->setTransparentSortingEnabled(true);
renderMaterial
->
getTechnique(
0
)
->
getPass(
0
)
->
getTextureUnitState(
0
)
->
setAlphaOperation(Ogre::LBX_MODULATE, Ogre::LBS_TEXTURE, Ogre::LBS_MANUAL,
1.0
,
0.1
);
//
0.8为透明度
mMiniScreen
->
setMaterial(
"
RttMat
"
);
终于会插入代码了 不用一点点 回车了 。。
这段内容比较多 除了 取出rtt 设置 透明 还有些别的内容
这段内容 是单独设置纹理透明的：
方法一 材质脚本模板:
material Template/TransparentTexture
{
technique
{
pass
{
lighting off
scene_blend alpha_blend
depth_write off
texture_unit
{
texture image.png
alpha_op_ex source1 src_manual src_texture 0.5
}
}
}
}
方法二 程序代码:
material->getTechnique(0)->getPass(0)->setSceneBlending(Ogre::SBT_TRANSPARENT_ALPHA);//SBT_TRANSPARENT_COLOUR
//material->getTechnique(0)->getPass(0)->setTransparentSortingEnabled(true);
material->getTechnique(0)->getPass(0)->getTextureUnitState(0)->setAlphaOperation(Ogre::LBX_MODULATE, Ogre::LBS_TEXTURE, Ogre::LBS_MANUAL,1.0, 0.8); // 0.8为透明度