Looking for some help with my custom scenenode please.
I am trying to create a terrain editor brush gizmo that sets itself to the height of the terrain.
I have posted a lot of code so sorry about that
derived from IMeshSceneNode and utilizes
Mesh = SceneManager->getGeometryCreator()->createPlaneMesh(dimension2df(1,1),dimension2du(SizeX,SizeZ));
to create a 'plane' mesh with sizex, sizez sections.
this all works fine and I can move it to the mouse picked location fine.
my trouble is in the code for calculating the vertex's real world position.
for some reason I get (randomly) 'nan' values for the vertices[].Pos.X or Z values
Code: Select all
void IGE_TerrainSelectorSceneNode::OnAnimate(u32 timeMs)
{
///////////////////////////////////////////////////////////
// if the terrain is valid
if (Terrain)
{
updateAbsolutePosition();
printf("----------------------------------\n");
// this node's meshbuffer
IMeshBuffer* mb = Mesh->getMeshBuffer(0);
// this node's vertices
S3DVertex2TCoords* pVertices = (S3DVertex2TCoords*)mb->getVertices();
// terrain bounding box
aabbox3df tb = Terrain->getTransformedBoundingBox();
// minimum and maximum terrain boundaries
// could use the tb directly but this is easier to read
float minx = tb.MinEdge.X;
float minz = tb.MinEdge.Z;
float maxx = tb.MaxEdge.X;
float maxz = tb.MaxEdge.Z;
// this nodes position
vector3df p = getPosition();
// this node's scale
vector3df scale = getScale();
printf("position = %f %f %f\n", p.X, p.Y, p.Z);
// for each vertex in this nodes meshbuffer
for (int v = 0; v < mb->getVertexCount(); ++v)
{
// get the vertex real world position x and z
// (since the node's position is set by the mouse position)
// scale the vertex pos.x and pos.z to make real world relative to this node's scale
// (because vertex pos is like 1,1,1 and then scaled by 10)
// and adding this node's position to make real relative to this node's position
// this should give us the vertex position in real world coordinates
[b] float x = p.X+(scale.X * pVertices[v].Pos.X);
float z = p.Z+(scale.Z * pVertices[v].Pos.Z);
printf("ScaleX = %f ScaleZ = %f\n", scale.X, scale.Z);
printf("pVertices[%d].X = %f pVertices[%d].Z = %f\n", v,pVertices[v].Pos.X, v, pVertices[v].Pos.Z);
printf("scaledX = %f scaledZ = %f\n", x, z);
[/b]
// if the real world coordinates are within the terrain boundaries
// this keeps us from trying to calculate anything outside the terrain
if (inRange(x, z, minx, minz, maxx, maxz))
{
// get the height of the terrain at the real world coordinates
float th = Terrain->getHeight(x, z);
// convert the terrain height to this node's unscaled height
float h = th;
// set this node's vertex height to the terrain's height
//pVertices[v].Pos.Y = h;
printf("v = %d x = %f z = %f h = %f\n\n", v, x, z, h);
}
else
{
printf("vertex %d is out of range %f %f\n\n", v, pVertices[v].Pos.X, pVertices[v].Pos.Z);
}
}
}
///////////////////////////////////////////////////////////
IMeshSceneNode::OnAnimate(timeMs);
}Code: Select all
----------------------------------
position = 246.743134 148.209915 386.808624
ScaleX = 10.000000 ScaleZ = 10.000000
pVertices[0].X = -1.000000 pVertices[0].Z = -1.000000
scaledX = 236.743134 scaledZ = 376.808624
v = 0 x = 236.743134 z = 376.808624 h = 137.810287
ScaleX = 10.000000 ScaleZ = 10.000000
pVertices[1].X = 0.000000 pVertices[1].Z = 1.000000
scaledX = 246.743134 scaledZ = 396.808624
v = 1 x = 246.743134 z = 396.808624 h = 133.138596
[b]ScaleX = 10.000000 ScaleZ = 10.000000
pVertices[2].X = 1.000000 pVertices[2].Z = -nan
scaledX = 256.743134 scaledZ = -nan
v = 2 x = 256.743134 z = -nan h = -340282346638528859811704183484516925440.000000
[/b]
ScaleX = 10.000000 ScaleZ = 10.000000
pVertices[3].X = -nan pVertices[3].Z = 1.000000
scaledX = -nan scaledZ = 396.808624
v = 3 x = -nan z = 396.808624 h = -340282346638528859811704183484516925440.000000
ScaleX = 10.000000 ScaleZ = 10.000000
pVertices[4].X = 0.500000 pVertices[4].Z = 0.000000
scaledX = 251.743134 scaledZ = 386.808624
v = 4 x = 251.743134 z = 386.808624 h = 141.680679
ScaleX = 10.000000 ScaleZ = 10.000000
pVertices[5].X = 0.000000 pVertices[5].Z = -0.000000
scaledX = 246.743134 scaledZ = 386.808624
v = 5 x = 246.743134 z = 386.808624 h = 140.209915
ScaleX = 10.000000 ScaleZ = 10.000000
pVertices[6].X = -0.000000 pVertices[6].Z = 0.000000
scaledX = 246.743134 scaledZ = 386.808624
v = 6 x = 246.743134 z = 386.808624 h = 140.209915
ScaleX = 10.000000 ScaleZ = 10.000000
pVertices[7].X = 0.000000 pVertices[7].Z = 1.000000
scaledX = 246.743134 scaledZ = 396.808624
v = 7 x = 246.743134 z = 396.808624 h = 133.138596
ScaleX = 10.000000 ScaleZ = 10.000000
pVertices[8].X = -0.000000 pVertices[8].Z = 0.000000
scaledX = 246.743134 scaledZ = 386.808624
v = 8 x = 246.743134 z = 386.808624 h = 140.209915