SDK Question Change Material setting

gattispilot · Friday at 2:11 PM

I got a question. On the Artemis1 I have the skin as reflective set in the GC cfg.

BUT after it reenters the atmosphere. I want the texture to change to a blacken one. I did that:


case 2:
if (!(int)h1)
if (h < 82000) {
ReloadMeshes(); // to show the burnt heatshield
h1 = 1;
if (MainExternalMeshVisual = 0)
oapiSetTexture(MainExternalMeshVisual, 26, BURNT_tex);
}

But how to make it not reflective?


MATERIAL 32
REFLECT 0.800000 0.800000 0.800000
ROUGHNESS 1.000000

BrianJ · Friday at 11:36 PM

Hi,
have a look at this function in gcAPI.h

Code:

gcMeshMaterial(DEVMESHHANDLE hMesh, DWORD idx, int prop, COLOUR4 *value, bool bSet);

gattispilot · Saturday at 12:30 AM

Thanks. It is the reflective value in the GC files.

gattispilot · Saturday at 12:31 AM

I think I can change the material but how to make it not reflective

BrianJ · Saturday at 12:54 AM

I've never used this function, so I'm not sure but......
I think you need to use

Code:

MESHM_REFLECT

as the "material property identifier"
Look in gcConst.h

gattispilot · Saturday at 11:41 AM

Thanks
so in the gcConst:
#define MESHM_REFLECT 0x20 ///< D3D9 material
gcapi.


int gcMeshMaterial(DEVMESHHANDLE hMesh, DWORD idx, int prop, COLOUR4 *value, bool bSet);
/**
* \brief A Function to get a mesh transformation/animation matrix.
* \param matrix_id Id of the matrix to get. One of gcMatrix::xxx datatypes.
* \param hVessel Vessel object handle.
* \param mesh Mesh index
* \param group Group index
* \param pMat A pointer to FMATRIX4 struct for receiving the data.
* \return 0 = on Success, or error code.
*/

What I want is the mesh to reflective but then under certain conditions the mesh changes texture and not reflective.

I think I could not that by replacing the meshes. But that seems a lot of work.

jarmonik · Saturday at 1:17 PM

If you provide a roughness map and a metalness map to make it reflective then a simple change of texture should disable it. Which would mean no reflective material setup. The material can be changed with "int SetMeshMaterial(DEVMESHHANDLE hMesh, DWORD idx, MatProp prop, const FVECTOR4* value)" Function declared in gcCoreAPI.h Also note that gcAPI.h is obsolete. (Still works for a backward compatibility)

It's recommended to use the texture approach. We may need to rearrange and cleanup the gcCoreAPI when the DX7 engine is removed. It's likely that all material parameters will be written in mesh files them selves (no more gc.cfg files) and some functions from gcCoreAPI are likely integrated to OrbiterAPI.

EDIT: Also it's recommended to use the Metalness shader for any new works.

gattispilot · Saturday at 1:37 PM

Thanks.
oapiSetTexture(MainExternalMeshVisual, 26, BURNT_tex);
The artemis skin is texture 26. But even though it changes the blue skin to black. It is still reflective. The reflectiveness is set in the gc files

Here is made the change in the mesh but the skin is still reflective

jarmonik · Sunday at 10:05 AM

Yes, if there's no texture to define reflectiveness then a material value is being used. One way to disable it is to provide a dummy BURNT_tex_refl.dds with black content. Texture will override marerial making it non-reflective.

gattispilot · Sunday at 12:30 PM

Ok not sure if I did this correctly.
then saved as dds.
artemisskinBURNT.dds
artemisskinBURNT_refl.dds

gattispilot · Monday at 10:02 AM

As I understand it.


if (h < 82000) {
ReloadMeshes(); // to show the burnt heatshield
h1 = 1;
oapiSetTexture(hOrbiterMAINMesh, 26, BURNT_tex);

the main mesh is mesh 0

This is the trigger to change texture 26 to the BURNT_tex, correct?

it does NOT change.

And then have a black reflective texture. named BURNT_refl.dds

ARTEMISCAPSULE/artemisskin5.dds is texture #26. this is what I need to change to brown non reflective.

jarmonik · Monday at 2:32 PM

Yes, the textures seems to be correct for the "Old PBR" shader but I haven't tested.

Could you confirm which shader is being used "PBR (Old)" or "Metalness PBR" ?

They use different textures and configurations.
Old PBR has three main textures:
MainTex.dds // color and alpha (rgba)
MainTex_refl.dds // reflection color (rgb)
MainTex_rghn.dds // greyscale texture, smoothness, 255 = mirror crisp, 0 = very rough

Metalness PBR has also three main textures:
MainTex.dds // color and alpha (rgba)
MainTex_metal.dds // greyscale texture "white" for metallic surface, "black" for non-metallic surface
MainTex_rghn.dds // greyscale texture, smoothness, 255 = mirros crisp, 0 = very rough (If the material is rough enough no reflection exists)

EDIT: Also note that if you control everything with textures you don't need to touch materials at all.

Here is a configuration example for Metalness PBR
Default "METALNESS" = 0
Default "SMOOTHNESS" = 1.0 1.0 (Main value) (Texture Gamma if texture exists)

Code:

CONFIG_VERSION 3
; =============================================
MESH DG\deltaglider_ns
SHADER Metalness
; ---------------------------------------------
MATERIAL 10
SMOOTHNESS 0.498039 1.000000
METALNESS 1.000000
; ---------------------------------------------
MATERIAL 11
SMOOTHNESS 0.000000 1.000000
; ---------------------------------------------
MATERIAL 12
SMOOTHNESS 0.576471 1.000000
METALNESS 1.000000
; ---------------------------------------------
MATERIAL 14
SMOOTHNESS 0.000000 1.000000
; ---------------------------------------------
MATERIAL 15
SMOOTHNESS 0.000000 1.000000
; ---------------------------------------------
MATERIAL 16
SMOOTHNESS 0.501961 1.000000
METALNESS 1.000000
; ---------------------------------------------
MATERIAL 17
SMOOTHNESS 0.000000 1.000000
; ---------------------------------------------
MATERIAL 18
SMOOTHNESS 0.000000 1.000000
; ---------------------------------------------
MATERIAL 24
SMOOTHNESS 0.933333 1.000000

gattispilot · Monday at 10:19 PM

I get this:
CONFIG_VERSION 3
; =============================================
MESH ARTEMIS\ARTEMISCOVER
; ---------------------------------------------
MATERIAL 1
REFLECT 0.800000 0.800000 0.800000
SMOOTHNESS 0.498039 1.000000
METALNESS 1.000000
; =============================================
MESH ARTEMIS\NEWARTEMIS
; ---------------------------------------------
MATERIAL 32
REFLECT 0.800000 0.800000 0.800000
SMOOTHNESS 0.498039 1.000000
METALNESS 1.000000
; ---------------------------------------------
MATERIAL 33
REFLECT 0.800000 0.800000 0.800000
SMOOTHNESS 0.498039 1.000000
METALNESS 1.000000

It is texture 26

SURFHANDLE BURNT_tex = oapiLoadTexture("Textures/ARTEMISCAPSULE/ARTEMISSKINBURNT.dds");

gattispilot · 2023-03-22T23:43:04+0000

Ok. I am not sure what is going on.


if (key == OAPI_KEY_G)
{
RevertHATCH();
oapiSetTexture(hmesh1, 26, BURNT_tex);
return 1;
}

this is the texture I what to change

ARTEMISCAPSULE/artemisskin5.dds d


void TALON::clbkVisualCreated(VISHANDLE vis, int refcount)
{
MainExternalMeshVisual = GetMesh(vis, 0);
//hmesh1 = GetDevMesh(vis, 0);
hmesh1 = GetDevMesh(vis, 0); // I assume capsule mesh index is 0
}

no change

gattispilot · 2023-03-23T10:06:19+0000

I ran this in default graphics and the texture changed to a blank texture. But nothing in the log.
oapiSetTexture(MainExternalMeshVisual, 26, BURNT_tex);
But if I ran in d3d9 I get a ctd


000000.000: Module ARTEMIS1.dll .......... [Build 230323, API 160828]
000000.000: ---------------------------------------------------------------
000000.000: >>> WARNING: Obsolete API function used: VESSEL::SetBankMomentScale
000000.000: At least one active module is accessing an obsolete interface function.
000000.000: Addons which rely on obsolete functions may not be compatible with
000000.000: future versions of Orbiter.
000000.000: ---------------------------------------------------------------
000000.000: Finished initialising status
000000.000: Finished initialising camera
000000.000: Finished setting up render state
D3D9: ERROR: Base Object 0x251B740 = 'J2LPAD' not cataloged
D3D9: ERROR: Base Object 0x16EFD638 = 'Tranquility Base' not cataloged
D3D9: ERROR: Base Object 0x16EFC818 = 'MoonbaseAlpha1' not cataloged
D3D9: ERROR: Base Object 0x16EFBD80 = 'Preary Base' not cataloged
D3D9: ERROR: Base Object 0x16F07940 = 'UCGO Base Europa' not cataloged
000000.000: D3D9: [Scene Initialized]
000000.000: Finished initialising panels
D3D9: NewShader [MeshIdx-1]=4


if (key == OAPI_KEY_G)
{
RevertHATCH();
//oapiSetTexture(hOrbiterMAINMesh, 26, BURNT_tex);//no change
oapiSetTexture(hmesh1, 26, BURNT_tex); //no change
//oapiSetTexture(MainExternalMeshVisual, 26, BURNT_tex); CTD
}


void TALON::clbkVisualCreated(VISHANDLE vis, int refcount)
{
MainExternalMeshVisual = GetMesh(vis, 0);
hmesh1 = GetDevMesh(vis, 0); // I assume capsule mesh index is 0
}

no change or ctd using hmesh1


000000.000: Module ARTEMIS1.dll .......... [Build 230323, API 160828]
000000.000: Finished initialising status
000000.000: Finished initialising camera
000000.000: Finished setting up render state
D3D9: ERROR: Base Object 0x1CB0B280 = 'J2LPAD' not cataloged
D3D9: ERROR: Base Object 0x298A20A0 = 'Tranquility Base' not cataloged
D3D9: ERROR: Base Object 0x298A07E8 = 'MoonbaseAlpha1' not cataloged
D3D9: ERROR: Base Object 0x298A3CE0 = 'Preary Base' not cataloged
D3D9: ERROR: Base Object 0x1FCCD648 = 'UCGO Base Europa' not cataloged
000000.000: D3D9: [Scene Initialized]
000000.000: Finished initialising panels
D3D9: NewShader [MeshIdx-1]=4
000021.447: D3D9: [Session Closed. Scene deleted.]
000021.447: D3D9: [Destroy Render Window Called]
000021.447: **** Closing simulation session

mesh is 0 and texture is 26

SDK Question Change Material setting

gattispilot

Addon Developer

BrianJ

Addon Developer

gattispilot

Addon Developer

gattispilot

Addon Developer

BrianJ

Addon Developer

gattispilot

Addon Developer

jarmonik

Well-known member

gattispilot

Addon Developer

Attachments

jarmonik

Well-known member

gattispilot

Addon Developer

Attachments

gattispilot

Addon Developer

jarmonik

Well-known member

gattispilot

Addon Developer

Attachments

gattispilot

Addon Developer

gattispilot

Addon Developer

Attachments

Similar threads