Objects with more than one material #31876

New Issue

MrLarodos · 2012-06-19T18:59:22+02:00

MrLarodos commented

2012-06-19 18:59:22 +02:00

Category: Physics

%%%Hi BlenderTeam!

If i have a floor-object (plane) with more than one material and my player "walks" on it, the BGE doesn´t notice on which material the player is walking. Only the first material in the objects material list will be recognized.
Thats especially not so nice if the player walks up a stone-ramp with a high friction value and the upper part of the ramp is covered with an ice material with low friction: The player doesn´t slide on the ice, because the first material in the objects material list is the one that gets recognized.

The only solution i found is to work with different objects, which gets very tricky if you want to build a floor in one piece...

In the attached file i have two scenes which you can test by pressing "p".

Scene 1 is called "1object": Here i have the floor and the ramp in one object and the player doesn´t slide as i mentioned above.

Scene 2 is called "2objects": Here i have the floor and the ramp in two different objects, but exactly the same materials attached to it. The player slides when he gets onto the ice as it should be.

Not shown in the file: If you want to check the current players walking-surface (f.e. with a collision- or raysensensor) with the ice-material in Scene 1 ("1object") you wont get it working. Blender always "thinks" that the player is walking on the first material in the objects material list. If it would work i could make different walking sounds on the different materials.

Question: Is it a bug or a feature?

Thank you in advance,
MrLarodos%%%

**Category**: Physics %%%Hi BlenderTeam! If i have a floor-object (plane) with more than one material and my player "walks" on it, the BGE doesn´t notice on which material the player is walking. Only the first material in the objects material list will be recognized. Thats especially not so nice if the player walks up a stone-ramp with a high friction value and the upper part of the ramp is covered with an ice material with low friction: The player doesn´t slide on the ice, because the first material in the objects material list is the one that gets recognized. The only solution i found is to work with different objects, which gets very tricky if you want to build a floor in one piece... In the attached file i have two scenes which you can test by pressing "p". Scene 1 is called "1object": Here i have the floor and the ramp in one object and the player doesn´t slide as i mentioned above. Scene 2 is called "2objects": Here i have the floor and the ramp in two different objects, but exactly the same materials attached to it. The player slides when he gets onto the ice as it should be. Not shown in the file: If you want to check the current players walking-surface (f.e. with a collision- or raysensensor) with the ice-material in Scene 1 ("1object") you wont get it working. Blender always "thinks" that the player is walking on the first material in the objects material list. If it would work i could make different walking sounds on the different materials. Question: Is it a bug or a feature? Thank you in advance, MrLarodos%%%

MrLarodos commented

2012-06-19 18:59:22 +02:00

Changed status to: 'Open'

MrLarodos commented

2012-12-12 21:41:18 +01:00

%%%Can please anybody check this?%%%

Raf Colson commented

2014-07-06 05:52:39 +02:00

Added subscriber: @raco

Raf Colson commented

2014-07-06 05:52:39 +02:00

@mrlarodos I've checked this and I can confirm that this is a bug. Maybe this simple blend will be more useful. Normally the Cube would be sliding faster until it reaches the grass material. Change the friction of the grass material to 0 or something low and you'll notice that indeed the friction value of the first material will affect the second material too.
Material_friction_bug.blend

@mrlarodos I've checked this and I can confirm that this is a bug. Maybe this simple blend will be more useful. Normally the Cube would be sliding faster until it reaches the grass material. Change the friction of the grass material to 0 or something low and you'll notice that indeed the friction value of the first material will affect the second material too. [Material_friction_bug.blend](https://archive.blender.org/developer/F96814/Material_friction_bug.blend)

Raf Colson commented

2014-07-24 04:37:07 +02:00

To be more specific it's the first 'created' material, not just the material on the first material block.