Nehe Tut7 Texture Problems

BlitzMax Forums/OpenGL Module/Nehe Tut7 Texture Problems

FBEpyon

(Posted 2005) [#1]

I can't seem to figure out why my texture have no read in any of the NeHe Texture tutorials I see the Green and Blue, but there isn't any red in the texture as if it wasn't being put the thru pixmap...

*	(Posted 2005) [#2]

I get a blue crate on the tut

Ibmurai

(Posted 2005) [#3]

I don't know if this is what you want to hear, but BlitzMax has some really neat builtin texturing helper functions, so that you can simply do this:

' Variables
Local thePixmap:TPixmap
Local theTexture:Int

' First set up openGL
bglCreateContext(800, 600)
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE)
glEnable(GL_TEXTURE_2D)

' Load the texture
thePixmap = LoadPixmap("incbin::picture.jpg")
theTexture = bglTexFromPixmap(thePixmap)

BlitzGL contains a few other nice tools, such as bglCreateContext - Just check the help on BlitzGL. Hope this helps.

FBEpyon

(Posted 2005) [#4]

Dude I know all this..

Im trying to figure out why the textures aren't loading right in the Nehe Tutorail 7

how else can I use OpenGL in blitz without using the context command

Extron

(Posted 2005) [#5]

Replace by this :

	For y=TexHeight-1 To 0 Step -1
		For x=0 To TexWidth-1
			Checkimage[y,x,0]=PointeurImg[pp+2]
			Checkimage[y,x,1]=PointeurImg[pp+1]
			Checkimage[y,x,2]=PointeurImg[pp+0]
			pp=pp+3
		Next
	Next

Now, why this changed for the 1.10 ?
Image is loaded in BGR order.

H&K	(Posted 2006) [#6]

@ Extron,

IF the Image (Pixmap) has an Alpha part (i.e is 32 bit) would I need

...
Checkimage [y,x,3] = PtrImg[pp+3]
pp:+4

Yours H&K