Drawimage with vertex colours
BlitzMax Forums/BlitzMax Programming/Drawimage with vertex colours
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| Does anyone know how to update this D3D textured poly function to allow for vertex colours as well as UV coordinates on each poly vert? http://www.blitzbasic.com/codearcs/codearcs.php?code=1812 Ideally, if anyone knows of a function or module that allow for an advanced 'drawimage' with the addition of vertex colours that would be cool. I`ve taken a look on the forums and can't find anything of this nature. thanks, andy. |
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| 1) vertex colors: instead of c[ii+3] = Driver.DrawColor set: c[ii+3] = alpha Shl 24 | red Shl 16 | green Shl 8| blue (alpha, red, green, blue:INT in the range 0 to 255) 2) uv: uv[ii+4] = u uv[ii+5] = v (u, v:FLOAT in the range 0 to 1) Shame on me that I haven't commented "thank you" at Progers article yet, because it offers really an explosion for the 2D-graphic-capabilities of BlitzMax ! So I take the possibility here: Thanks a lot ! |
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| Thanks Michael! That's just what I was after. Andy |
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| Thanks again for your help Michael. I`ve almost completed the function but there's still a couple of issues that are puzzling me. When I set the U or V coordinate I assumed a value of 1.0 would give me the furthest right & bottom edges of the loaded image. Instead, after a lot of blind number changes, I`m having to put in 0.72 for U and 0.585 for V? Any idea what this magic numbers relate to? Second problem is the rotation of the image. If you run the below code you'll notice my coloured image is rotated the same as the DrawImage version except it's offset? Any idea why this is happening? Strict Graphics 640,480 SetClsColor 100,100,100 Cls Local Image:TImage = LoadImage("Dizzy.png", MASKEDIMAGE) Local ColA:Int[] = [255,255,192,0] Local ColB:Int[] = [255,255,0,0] Local ColC:Int[] = [255,0,0,128] Local ColD:Int[] = [255,0,0,128] Local XPos#=100 Local YPos#=50 SetRotation 45 SetBlend AlphaBlend SetScale 2,2 SetAlpha 1.0 DrawImage Image,XPos,YPos DrawColImage Image, XPos, YPos, ColA, ColB, ColC, ColD Flip WaitKey '---------------------------------------------------------------------------------------------------- ' DrawColImage <IMG>, XPos#, YPos#, ColA[], ColB[], ColC[], ColD[], Frame% '---------------------------------------------------------------------------------------------------- Function DrawColImage( image:TImage,Xp, Yp, ClrA[], ClrB[], ClrC[], ClrD[], frame=0) Local handle_x#, handle_y# GetHandle handle_x#, handle_y# Local tx#, ty# GetOrigin tx#, ty# Local Alph#=GetAlpha() ClrA[0]=ClrA[0]*Alph ClrB[0]=ClrB[0]*Alph ClrC[0]=ClrC[0]*Alph ClrD[0]=ClrD[0]*Alph Local Driver:TD3D7Max2DDriver = TD3D7Max2DDriver(_max2dDriver) Assert Image, "Image not found" Local uv#[24] Local ImgWidth#=Image.width Local ImgHeight#=Image.Height Local x#=Xp+Handle_X# Local Y#=Yp+Handle_Y# Local LeftX#=x Local RightX#=x+ImgWidth# Local UpY#=y Local DownY#=y+ImgHeight# Local c:Int Ptr=Int Ptr(Float Ptr(uv)) uv[0]=LeftX#*Driver.ix+UpY*Driver.iy+tx '--X POS uv[1]=LeftX#*Driver.jx+UpY*Driver.jy+ty '--Y POS uv[2]=0 '--Z POS c[3]= ClrA[0] Shl 24 | ClrA[1] Shl 16 | ClrA[2] Shl 8 | ClrA[3] '--ARGB COLORS uv[4]= 0.0 ; uv[5]= 0.0 '--UV COORDS uv[6]=RightX#*Driver.ix+UpY*Driver.iy+tx uv[7]=RightX#*Driver.jx+UpY*Driver.jy+ty uv[8]=0 c[9]= ClrB[0] Shl 24 | ClrB[1] Shl 16 | ClrB[2] Shl 8 | ClrB[3] uv[10]= .72 ; uv[11]= 0.0 uv[12]=RightX#*Driver.ix+DownY*Driver.iy+tx uv[13]=RightX#*Driver.jx+DownY*Driver.jy+ty uv[14]=0 c[15]= ClrC[0] Shl 24 | ClrC[1] Shl 16 | ClrC[2] Shl 8 | ClrC[3] uv[16]= .72 ; uv[17]= .585 uv[18]=LeftX#*Driver.ix+DownY*Driver.iy+tx uv[19]=LeftX#*Driver.jx+DownY*Driver.jy+ty uv[20]=0 c[21]= ClrD[0] Shl 24 | ClrD[1] Shl 16 | ClrD[2] Shl 8 | ClrD[3] uv[22]= 0.0 ; uv[23]= .585 Driver.SetActiveFrame TD3D7ImageFrame(image.Frame(frame)) Driver.device.DrawPrimitive(D3DPT_TRIANGLEFAN,D3DFVF_XYZ| D3DFVF_DIFFUSE | D3DFVF_TEX1,uv,4,0) End Function Thanks for your help, andy p.s. how do you embed code into a code box? |
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