How to export bump 3d model to use normal mapping by fbx-conv

quano1 · May 6, 2016, 3:23pm

Hi cocos, I have an ugent demo for my customer in the next 2 weeks. I really really need your helps

I’m trying to export 3d model with normal mapping.

Looking into fbx-conv tool, I have found option -p (Export tagent binormal data.).

fbx-conv.exe -t -p -v BlenderGuruCobblestoneStreetFinal.fbx

But I cannot export c3b, c3t including VERTEX_ATTRIB_TANGENT, VERTEX_ATTRIB_BINORMAL

from here: https://github.com/cocos2d-x/fbx-conv

I saw that, VERTEX_ATTRIB_TANGENT will not be exported if model does not have normal material. (I have no experience with blender or any other 3d tool)

I tried with fbx model from blenderguru but it still not work.

I did the wrong thing, or fbx-conv have some problem in exporting procedure ?

here is my convert output:

INFO:     FBX to c3x converter, version 0.7 x32 (release version, cocos2d-x-3.4
beta0 or later version can use)
STATUS:   Loading source file
PROGRESS: Import FBX 1.89% Plane.019
PROGRESS: Import FBX 3.77% Plane.018
PROGRESS: Import FBX 5.66% Plane.017
PROGRESS: Import FBX 7.55% Plane.016
PROGRESS: Import FBX 9.43% Cylinder.012
PROGRESS: Import FBX 11.32% Cylinder.011
PROGRESS: Import FBX 13.21% Cylinder.010
PROGRESS: Import FBX 15.09% Cylinder.009
PROGRESS: Import FBX 16.98% Cylinder.008
PROGRESS: Import FBX 18.87% Cylinder.007
PROGRESS: Import FBX 20.75% Cylinder.006
PROGRESS: Import FBX 22.64% Cylinder.005
PROGRESS: Import FBX 24.53% Cylinder.004
PROGRESS: Import FBX 26.42% Cylinder.003
PROGRESS: Import FBX 28.30% Cylinder.002
PROGRESS: Import FBX 30.19% Plane.015
PROGRESS: Import FBX 32.08% Plane.013
PROGRESS: Import FBX 33.96% Cylinder.013
PROGRESS: Import FBX 35.85% Stalk-big1
PROGRESS: Import FBX 37.74% Original
PROGRESS: Import FBX 39.62% SecondOriginal
PROGRESS: Import FBX 41.51% Variation B
PROGRESS: Import FBX 43.40% VariationC.001
PROGRESS: Import FBX 45.28% VariationD
PROGRESS: Import FBX 47.17% Material.006
PROGRESS: Import FBX 49.06% Material.005
PROGRESS: Import FBX 50.94% Material.003
PROGRESS: Import FBX 52.83% Material.002
PROGRESS: Import FBX 54.72% ThickGrass
PROGRESS: Import FBX 56.60% Plane.011
PROGRESS: Import FBX 58.49% Plane.010
PROGRESS: Import FBX 60.38% Plane.009
PROGRESS: Import FBX 62.26% Plane.008
PROGRESS: Import FBX 64.15% Mesh
PROGRESS: Import FBX 66.04% Mesh.001
PROGRESS: Import FBX 67.92% Mesh.002
PROGRESS: Import FBX 69.81% Mesh.003
PROGRESS: Import FBX 71.70% Mesh.004
PROGRESS: Import FBX 73.58% Mesh.005
PROGRESS: Import FBX 75.47% Mesh.006
PROGRESS: Import FBX 77.36% Mesh.007
PROGRESS: Import FBX 79.25% Mesh.008
PROGRESS: Import FBX 81.13% Mesh.009
PROGRESS: Import FBX 83.02% Mesh.010
PROGRESS: Import FBX 84.91% Plane.002
PROGRESS: Import FBX 86.79% Mesh.011
PROGRESS: Import FBX 88.68% Mesh.012
PROGRESS: Import FBX 90.57% Mesh.013
PROGRESS: Import FBX 92.45% Mesh.014
PROGRESS: Import FBX 94.34% Mesh.015
PROGRESS: Import FBX 96.23% Mesh.016
PROGRESS: Import FBX 98.11% Mesh.017
PROGRESS: Import FBX 100.00%

STATUS:   [Plane.011] Triangulating FbxMesh geometry
STATUS:   [Plane.010] Triangulating FbxMesh geometry
STATUS:   [Plane.009] Triangulating FbxMesh geometry
STATUS:   [Plane.008] Triangulating FbxMesh geometry
STATUS:   [Mesh] Triangulating FbxMesh geometry
STATUS:   [Mesh.001] Triangulating FbxMesh geometry
STATUS:   [Mesh.002] Triangulating FbxMesh geometry
STATUS:   [Mesh.003] Triangulating FbxMesh geometry
STATUS:   [Mesh.004] Triangulating FbxMesh geometry
STATUS:   [Mesh.005] Triangulating FbxMesh geometry
STATUS:   [Mesh.006] Triangulating FbxMesh geometry
STATUS:   [Mesh.007] Triangulating FbxMesh geometry
STATUS:   [Mesh.008] Triangulating FbxMesh geometry
STATUS:   [Mesh.009] Triangulating FbxMesh geometry
STATUS:   [Mesh.010] Triangulating FbxMesh geometry
STATUS:   [Plane.002] Triangulating FbxMesh geometry
STATUS:   [Mesh.011] Triangulating FbxMesh geometry
STATUS:   [Mesh.012] Triangulating FbxMesh geometry
STATUS:   [Mesh.013] Triangulating FbxMesh geometry
STATUS:   [Mesh.014] Triangulating FbxMesh geometry
STATUS:   [Mesh.015] Triangulating FbxMesh geometry
STATUS:   [Mesh.016] Triangulating FbxMesh geometry
STATUS:   [Mesh.017] Triangulating FbxMesh geometry
VERBOSE:  [Plane.011] polygons: 128 (384 indices), control points: 81
VERBOSE:  [Plane.010] polygons: 128 (384 indices), control points: 81
VERBOSE:  [Plane.009] polygons: 128 (384 indices), control points: 81
VERBOSE:  [Plane.008] polygons: 128 (384 indices), control points: 81
VERBOSE:  [Mesh] polygons: 116 (348 indices), control points: 120
VERBOSE:  [Mesh.001] polygons: 116 (348 indices), control points: 128
VERBOSE:  [Mesh.002] polygons: 116 (348 indices), control points: 124
VERBOSE:  [Mesh.003] polygons: 212 (636 indices), control points: 144
ERROR:    [Mesh.003] Skipping geometry without material
VERBOSE:  [Mesh.004] polygons: 44 (132 indices), control points: 56
VERBOSE:  [Mesh.005] polygons: 44 (132 indices), control points: 56
VERBOSE:  [Mesh.006] polygons: 44 (132 indices), control points: 56
VERBOSE:  [Mesh.007] polygons: 44 (132 indices), control points: 56
VERBOSE:  [Mesh.008] polygons: 44 (132 indices), control points: 56
VERBOSE:  [Mesh.009] polygons: 212 (636 indices), control points: 146
ERROR:    [Mesh.009] Skipping geometry without material
VERBOSE:  [Mesh.010] polygons: 44 (132 indices), control points: 56
VERBOSE:  [Plane.002] polygons: 2 (6 indices), control points: 4
VERBOSE:  [Mesh.011] polygons: 22680 (68040 indices), control points: 25920
WARNING:  Mesh contains more indices (68040) than the specified maximum (32767)
VERBOSE:  [Mesh.012] polygons: 1200 (3600 indices), control points: 790
VERBOSE:  [Mesh.013] polygons: 1200 (3600 indices), control points: 790
VERBOSE:  [Mesh.014] polygons: 1440 (4320 indices), control points: 945
VERBOSE:  [Mesh.015] polygons: 992 (2976 indices), control points: 655
VERBOSE:  [Mesh.016] polygons: 880 (2640 indices), control points: 575
VERBOSE:  [Mesh.017] polygons: 1216 (3648 indices), control points: 800
STATUS:   Converting source file
STATUS:   Closing source file
VERBOSE:  Listing model information:
VERBOSE:  ID        :
VERBOSE:  Version   : Hi=0, Lo=7
VERBOSE:  Meshes    : 3 (250520 vertices, 21 parts, 92202 indices)
VERBOSE:  Nodes     : 24 root, 24 total, 22 parts
VERBOSE:  Materials : 5 (0 textures)
STATUS:   Exporting to c3t file: BlenderGuruCobblestoneStreetFinal.c3t
STATUS:   Closing exported file    indent preformatted text by 4 spaces

here is my c3t:

{
	"version": "0.7", 
	"id": "", 
	"meshes": [
		{
			"attributes": [{
					"size":   3, 
					"type": "GL_FLOAT", 
					"attribute": "VERTEX_ATTRIB_POSITION"
				}, {
					"size":   3, 
					"type": "GL_FLOAT", 
					"attribute": "VERTEX_ATTRIB_NORMAL"
				}, {
					"size":   2, 
					"type": "GL_FLOAT", 
					"attribute": "VERTEX_ATTRIB_TEX_COORD"
				}],

Any help would be very valuable to me

quano1 · May 7, 2016, 6:21pm

Anyone ? plzzz

Glidos · June 18, 2016, 11:19am

I am trying to do the same and haven’t yet got it working so the following may not help:

I don’t believe Blender has a concept of “normal material”. I can only think that that means a material that has a texture for which

Normal Map has been checked
Tangent has been selected
Diffuse Color has been unchecked
Geometry Normal has been checked

but presumably you must have that otherwise your model wouldn’t look correct in Blender

My c3t file has this:

"materials": [
	{
		"id": "Material__lizard-tex-plain_png", 
		"ambient": [ 1.000000,  1.000000,  1.000000], 
		"diffuse": [ 0.800000,  0.800000,  0.800000], 
		"emissive": [ 0.800000,  0.800000,  0.800000], 
		"opacity":  1.000000, 
		"textures": [
			{
				"id": "lizard-tex-plain_png", 
				"filename": "lizard-tex-x.png", 
				"type": "DIFFUSE", 
				"wrapModeU": "REPEAT", 
				"wrapModeV": "REPEAT"
			},
			{
				"id": "lizard-norm-plain_png", 
				"filename": "lizard-norm-x.png", 
				"type": "NORMAL", 
				"wrapModeU": "REPEAT", 
				"wrapModeV": "REPEAT"
			}
		]
	}
],

quano1 · June 19, 2016, 8:19am

Do you have TANGENT properties in you c3t file ?
Can you render sprite with normal mapping ?
look into tests/cpp-tests/Resources/Sprite3DTest/sphere_bumped.c3b. We can find VERTEX_ATTRIB_TANGENT and VERTEX_ATTRIB_BINORMAL
2 aboves attribute is used for normal mapping.

And I still don’t known how to export model include these attribute.
Do you have any solution for this ?

Glidos · June 19, 2016, 9:38am

I do!!! Just five minutes ago I got it working. Within Blender, when exporting to FBX, use the 7.4 version, click the Geometrie tab and check Tangent Space. Then use the -p flag to fbx-conv.

Glad I found your post. I didn’t realise that the lack of tangen space was the problem. Nor did I know of the -p flag.

I want specular highlights so I’m going to have to mess with the shaders but having the normal map working at all is a big step forward.

quano1 · June 21, 2016, 7:41am

Thank you so much, I have tangent and binormal now

Glidos · September 24, 2018, 6:05pm

I looked back at this, hoping to mark it as solved, but I cannot see the “tick” button on any post.