Terrains and caustics/weird coloring effect

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Terrains and caustics/weird coloring effect

Postby ofcaveman » Wed Mar 28, 2012 2:46 am

Ok, I have hydrax demo working, added a terrain using the tutorial 3, and this post http://www.o-openuniverse.org/story/add ... in-ogre-17. I modified the terrain so it is sand colored, and changed the scaling a bit so it wasn't so mountainous. I was wondering how these work, BTW:
defaultimp.layerList.resize(3);
defaultimp.layerList[0].worldSize = 100;
defaultimp.layerList[0].textureNames.push_back("sand_1_diffusespecular.dds");
defaultimp.layerList[0].textureNames.push_back("sand_1_normalheight.dds");
defaultimp.layerList[1].worldSize = 30;
defaultimp.layerList[1].textureNames.push_back("grass_green-01_diffusespecular.dds");
defaultimp.layerList[1].textureNames.push_back("grass_green-01_normalheight.dds");
defaultimp.layerList[2].worldSize = 200;
defaultimp.layerList[2].textureNames.push_back("growth_weirdfungus-03_diffusespecular.dds");
defaultimp.layerList[2].textureNames.push_back("growth_weirdfungus-03_normalheight.dds");

Does this make the mountains different textures depending upon what the altitude is? I am guessing this case, there is grass on the lowest level, then sand, then weird fungus?

I then lowered the terrain into the water using:
Ogre::Vector3 lcTerrainVector(0.0, -800.0, 0.0);
mTerrainGroup->setOrigin(lcTerrainVector);

Now, before I even changed to the sand texture, that caustics were not being applied to any of the terrain - only to the underwater sand of the island.

I tried to fix the caustic by using something from another post:
TerrainGroup::TerrainIterator ti = mTerrainGroup->getTerrainIterator();
while(ti.hasMoreElements())
{
Terrain* t = ti.getNext()->instance;
MaterialPtr ptr = t->getMaterial();
mHydrax->getMaterialManager()->addDepthTechnique(ptr->createTechnique());
}

I also noticed that once the terrain was lowered into the water, the terrain turned white, and at the edge of the island, there is a white strip of border (perhaps the terrain?), and when I try to move the camera past it, the strip seems to widen.

Any ideas on what I am seeing, or how to fix it? I am very new at this, so just trying to understand it all...

Thanks,

-Kevin
ofcaveman
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Re: Terrains and caustics/weird coloring effect

Postby ofcaveman » Tue Apr 03, 2012 3:19 am

I figured this out. I had the ordering of my functions incorrect. I moved the terrain stuff to be much later (just prior to the palms code). The following snippet I moved to the very end:
Code: Select all
TerrainGroup::TerrainIterator ti = mTerrainGroup->getTerrainIterator();
while(ti.hasMoreElements())
{
Terrain* t = ti.getNext()->instance;
MaterialPtr ptr = t->getMaterial();
mHydrax->getMaterialManager()->addDepthTechnique(ptr->createTechnique());
}
ofcaveman
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