MeshVertexColor(Color) No Alpha

[Thade]

Hi

MeshVertexColor(Color)

Docs:
Color of the vertex. This color can be in RGB or RGBA format

Alpha in RGBA has no effect (is always 255). RGB works as it should.

Code: Select all

Procedure CreateText3D(Text.s, Material, Color, Color2= $FFFFFFFF)
	Protected Mesh
	Mesh=CreateMesh(-1)
	For i=0 To Len(Text)-1
		c=Asc(Mid(Text, i+1, 1))
		cu=c & 15
		cv=c >> 4
		cuf.f=0.0625 * cu
		cvf.f=0.125 * cv
		AddMeshVertex(-0.5+i, 0.5, 0)
		MeshVertexTextureCoordinate(cuf, cvf)
		MeshVertexColor(Color)
		AddMeshVertex(0.5+i, 0.5, 0)
		MeshVertexTextureCoordinate(cuf+0.0625, cvf)
		MeshVertexColor(Color)
		AddMeshVertex(-0.5+i, -0.5, 0)
		MeshVertexTextureCoordinate(cuf, cvf+0.125)
		MeshVertexColor(Color2)
		AddMeshVertex(0.5+i, -0.5, 0)
		MeshVertexTextureCoordinate(cuf+0.0625, cvf+0.125)
		MeshVertexColor(Color2)
		AddMeshFace(i*4+0, i*4+2, i*4+1)
		AddMeshFace(i*4+1, i*4+2, i*4+3)
	Next
	FinishMesh()
	NormalizeMesh(Mesh)
	MaterialBlendingMode(Material, #PB_Material_AlphaBlend)
	MaterialAmbientColor(Material, #PB_Material_AmbientColors)
	SetMeshMaterial(Mesh, MaterialID(Material))
	Entity=CreateEntity(-1, MeshID(Mesh), MaterialID(Material))
	FreeMesh(Mesh)
	ProcedureReturn Entity
EndProcedure

Material is a Texture Font.Png 1024x1024 with white Chars and transparent background - Chars: 0 - 127 (0 - 31 empty)
Edit: Uploaded the Font Texture http://www.RRSoftware.net/uploads/Forum ... shadow.png

Code: Select all

Cam1=CreateCamera(-1, 0, 0, 100, 100)

At Initialising

Code: Select all

	Text.s = StrF(Engine3DFrameRate(#PB_Engine3D_Current),2)
	If OldText.s<>Text
		DeleteText3D(Entity1)
		Entity1=CreateText3D(Text.s, FontMaterial1, RGBA(255,0,0,255), RGBA(255,255,0,255))
		EntityLocate(Entity1, 0, 60, 300)
		ScaleEntity(Entity1, 10, 40, 10)
		OldText=Text
	EndIf
	Text2.s = Str(Zlr)
	If OldText2.s<>Text2
		DeleteText3D(Entity2)
		Entity2=CreateText3D(Text2.s, FontMaterial1, RGBA(255,0,0,127), RGBA(255,255,0,127))
		EntityLocate(Entity2, 0, 20, 300)
		ScaleEntity(Entity2, 10, 40, 10)
		OldText2=Text2
	EndIf
	Zlr+1

    CameraLocate(Cam1, 0, 100, 600)
    CameraLookAt(Cam1, EntityX(Entity1), EntityY(Entity1), EntityZ(Entity1))
 

Put this inside any 3DDemo into the Main Loop

RR

[Comtois]

MeshVertexColor(Color) work fine. the bug is in MaterialBlendingMode().

Should work with this materialScript

Code: Select all

material MyMaterial
{
	technique
	{
		pass
		{
			lighting off
			scene_blend alpha_blend
			depth_write off

			texture_unit
			{
				texture arial_blackshadow.png
			}
		}
	}
}

[Thade]

Hi Comtois

No - this works on the complete Background of each surface - or the Colors are not displayed (Chars are only white) - Maybe I do something wrong - but changing commands and parameters show different results - none of them shows the wanted one.

Anyway - my expierience with 10 years Blitz3D Background tells me:
MeshVertexColor() does NOT work as it should. It colors the vertices as expected but does NOT make them semitransparent as it should happen. 50 other engines would do exact this right!
And MaterialBlendingMode() seems to be okay - because it makes the background transparent as expected.

Edited:
A Material script is by far not versatile enough ... Obviously wrong as Comtois shows below ...


RR

[Comtois]

using the script, I get this


this is not the expected result?

Before testing with script, have you commented these lines ?

Code: Select all

   ;MaterialBlendingMode(Material, #PB_Material_AlphaBlend)
   ;MaterialAmbientColor(Material, #PB_Material_AmbientColors)

[Thade]

Looks as I expected it - obviously my fault - I made something wrong in my code.

Have to make it better net time

using the script, I get this

Before testing with script, have you commented these lines ?

Code: Select all

   ;MaterialBlendingMode(Material, #PB_Material_AlphaBlend)
   ;MaterialAmbientColor(Material, #PB_Material_AmbientColors)

Yes I did - but obviously made a mistake assigning the Material to the entity ...

[Thade]

Thank you for your help, Comtois - now it's working fine. The results are identical now

Is it nessessary to destroy the mesh and build a new mesh each time the Text changes? There's no chance to manipulate surfaces and vertices in an existing entity build from a mesh, right? Or did I miss something in the manual?

[Comtois]

There's no chance to manipulate surfaces and vertices in an existing entity build from a mesh, right?

It's on my TodoList.

[Olby]

There's no chance to manipulate surfaces and vertices in an existing entity build from a mesh, right? Or did I miss something in the manual?

Yup, I would like to do that as well. Quite a hassle now.

[Comtois]

There's no chance to manipulate surfaces and vertices in an existing entity build from a mesh, right? Or did I miss something in the manual?

Yup, I would like to do that as well. Quite a hassle now.

It's on the top of my toDo List

MaterialBlendingMode() is fixed

[Olby]

There's no chance to manipulate surfaces and vertices in an existing entity build from a mesh, right? Or did I miss something in the manual?

Yup, I would like to do that as well. Quite a hassle now.

It's on the top of my toDo List

MaterialBlendingMode() is fixed

Are you working on PB, didn't know that.

[Fred]

Yes, he works on the 3D side, doing an amazing job

[Olby]

Yassss, now I know where to send off my 3D requests!! Well done Comtois

[Lexicon]

Hi!

Can I use MeshVertexColor without disable lightning? I need to colored my terrain but I can't change ambient light and fog's color. Also, how can I make evening, night, morning in my game without lightning?..