Terrain rendering

mindwarp · Post by **mindwarp** » Mon Sep 13, 2004 7:32 pm

Ok before people dig into me: I did use the search function, but I think I may need a little more hand holding than what is currently posted.

I am looking just to render some terrain, and I can make it appear on screen using a greyscale bmp file for my data. I still am, even after reading the tutorials, a bit unclear on triangle selectors. I would also like to implement a octtree, and while I am aware there is a scene node for it I am having a little trouble grasping that also. Can anyone post some code showing a full working example from beginning to end?

Kaeles · Post by **Kaeles** » Mon Sep 13, 2004 9:13 pm

Code: Select all

//====================================================
// init terrain  //
	IImage* heightmap= driver->createImageFromFile("hieghtmap.bmp");
	IImage* texture= driver->createImageFromFile("texture.jpg");
	ISceneNode* TerrainNode = 0;
	IAnimatedMesh* terrain = 0;
		smgr->addTerrainMesh("terrain",texture,heightmap,core::dimension2d<f32>
							(10.0f,10.0f),1000.0f,core::dimension2d<s32>(64,64));
	 terrain = smgr->getMesh("terrain");
	 TerrainNode = smgr->addAnimatedMeshSceneNode(terrain);
//create triangle selector//
	 ITriangleSelector* selector = 
		 smgr->createTriangleSelector(terrain->getMesh(0),TerrainNode);

//options loop//	 
	 if (TerrainNode)
 {
	 TerrainNode->setMaterialFlag(EMF_LIGHTING, false);
	 TerrainNode->setPosition(core::vector3df (-3000.0f,0.0f,-3000.0f));
	 TerrainNode->setTriangleSelector(selector);
	 selector->drop();
 }
//====================================================
// init camera //
	ICameraSceneNode* camera = smgr->addCameraSceneNodeFPS();
	camera->setFOV(1.5);
	//camera->setFarValue(40000.0f);
	camera->setPosition(core::vector3df (200.0f,1200.0f,200.0f));
//camera animator//	
/*
	ISceneNodeAnimator* CameraAnim = 
		smgr->createCollisionResponseAnimator(selector,camera,core::vector3df(30,60,30),
												core::vector3df(0,-100,0), 100.0f,
												core::vector3df(0,50,0));
	camera->addAnimator(CameraAnim);
	CameraAnim->drop();

Asheh · Post by **Asheh** » Tue Sep 14, 2004 9:10 pm

I actually just tried this out but it hangs:

ITriangleSelector *selector = smgr->createOctTreeTriangleSelector(terrain->getMesh(0),terrNode);

Why would this happen?

Kaeles · Post by **Kaeles** » Wed Sep 15, 2004 8:00 pm

uh, are you using irr.6?
cause ive had problems with irr.7... i dunno for sure though, ill check later
my brain is fried.... too much class, too little time

Chakotay1308 · Post by **Chakotay1308** » Thu Sep 16, 2004 2:18 pm

Hi guys,
I think I need some help...

I've just copied it to my source (just to test it). It works generally, but I can't find any terrain. Sometimes I can see in the upper left edge of the window a small piece of green (this is my "texture").

My "Terrain" is 64x64px sized mspaint-picture.

Black should be the deepest und white the highest point on the terrain. And my "texture" is a 64x64px sized piece of green (also made by paint).

So what was my fault with this?

Thanks a lot,
Chris

PS: I'm using irr.7 and have no problems!

Kaeles · Post by **Kaeles** » Thu Sep 16, 2004 5:17 pm

I dont know why it hangs with octTreeTriangleSelector, but im guessing its because its not an octreescenenode?
if you change it to createTriangleSelector, it works fine

well first, disable the animator on the camera, to make sure your not just falling through space... lol, ive done it many times.