I splitted the collision terrain into small pieces, currently 3x3 grid of quads, and it’s adjustable.
screenshot showing the rendered & randomly colored 3x3 quads collision nodes.
# Now create a terrain model from the heightmap.
tnp = render.attachNewNode("Terrain")
data4Rendering = EggData()
vp = EggVertexPool('Terrain vertex pool')
# nodepath to hold collision nodes
tCollNP = tnp.attachNewNode("Terrain4Collision")
# supply the eggGroup & eggVPool for the first node
vCollpool = EggVertexPool('TerrainCollision vpool')
collGroup = EggGroup('collQuads')
collGroup.addObjectType('barrier')
# we use (numQuadGrid x numQuadGrid) quads for 1 collision node
numQuadGrid=3
# the modulo of (size-2)/numQuadGrid, to mark when the quads must be built into 1 geom
edgeMod=(size-2)%numQuadGrid
for i in range(0,len(midpoints)-1, numQuadGrid):
# limit nextIrange to avoid it from jump over the edge
nextIrange=min(numQuadGrid,len(midpoints)-1-i)
for j in range(0,len(midpoints)-1):
for nextI in range(0,nextIrange):
bl = Point3D(i+nextI,j,midpoints[i+nextI][j])
tr = Point3D(i+nextI+1,j+1,midpoints[i+nextI+1][j+1])
br = Point3D(i+nextI+1,j,midpoints[i+nextI+1][j])
tl = Point3D(i+nextI,j+1,midpoints[i+nextI][j+1])
poly, polyColl = makeRectangle(vp,vCollpool,bl,tr,br,tl)
data4Rendering.addChild(poly)
# add a quad for collision terrain
collGroup.addChild(polyColl)
# build the collision node geom
if j%numQuadGrid==edgeMod and nextI==nextIrange-1:
data4Collision = EggData()
data4Collision.addChild(collGroup)
rectNode = loadEggData(data4Collision)
cNP=tCollNP.attachNewNode(rectNode.getChild(0).getChild(0))
# uncomment the next line to see the collision geom
#cNP.show()
# supply the eggGroup & eggVPool for the next node
collGroup = EggGroup('collQuads')
collGroup.addObjectType('barrier')
vCollpool = EggVertexPool('TerrainCollision vpool')
pandaNode = loadEggData(data4Rendering)
tnp.attachNewNode(pandaNode)
return tnp, tCollNPThanks for the pointer, David, now it can hit 39 fps ! 