Hpolygon triangle, colors doesn't work

#1

Hello everyone

unRegisterRedrawViewsCallback li

fn li =(
gw.setColor #fill (color 0 255 255)
gw.setColor #line (color 0 255 0)
	
gw.hPolyline #([300,50,16], [300,200,8], [450,250,4]) true
--
gw.hPolygon #([200,100,16], [380,100,8], [250,200,4]) \
#((color 255 255 0), (color 0 255 255), (color 0 255 0)) \
#([1.0,.5,0], [0.5,0.5,0], [0,0,0.5])

gw.setTransform(Matrix3 1)
gw.startTriangles()
gw.triangle #([0,0,0], [50,0,0], [50,50,0]) #((color 255 255 0), (color 0 255 255), (color 0 255 0))
gw.triangle #([0,0,0], [50,50,0], [0,50,0]) #((color 255 255 0), (color 0 255 255), (color 0 255 0))
gw.endTriangles()
 	
-- Update the viewports
gw.enlargeUpdateRect #whole
gw.updateScreen()

)

registerRedrawViewsCallback li

In the above script the vertex color doesn’t work. As you can see I tried both hPolygon and triangle. Tested in 3dsmax 2018 and 2020 same result. Tested with dx, nitro, opegnl, software display driver same result. Also gw.setColor #fill (color 0 255 255) doesn’t work.
Only hpolyline seems to work at least is coherent with the line color I set.

I think they are corrupted functions, they get the color from a random state inside the engine.

Attached the output

color_vertex_bug
color_vertex_bug.jpg1436x795 114 KB

Let me know if I miss something or there is a workaround.

Thanks

#2

Ok, I did a working test at lest for triangle

unRegisterRedrawViewsCallback li

fn li =(
lim = #()
append lim #zBuffer
append lim #colorVerts
gw.setRndLimits lim
gw.setTransform(Matrix3 1)
gw.startTriangles()
gw.triangle #([0,0,0], [500,0,0], [500,500,0]) #((color 255 0 0), (color 0 0 255), (color 0 255 0))
gw.triangle #([0,0,0], [500,500,0], [0,500,0]) #((color 255 0 0), (color 0 255 0), (color 0 255 255))
gw.endTriangles()

– Update the viewports
gw.enlargeUpdateRect #whole
gw.updateScreen()

)

registerRedrawViewsCallback li

The problem is related to polygon hpolygon and wpolygon. Maybe they are corrupted?
I need to render a quad screen with an image, only these function accept in input uv coord.

Thanks

#3

there’s no bug you need to set the correct render limits

unRegisterRedrawViewsCallback li

fn li =
(
	gw.setRndLimits #(#lighting,#backcull,#colorVerts)


	gw.setTransform(Matrix3 1)	

	
	gw.startTriangles()
	gw.triangle #([0,0,0], [50,0,0], [50,50,0]) #([255,255,0], [0,0,255], [0,0,0])
	gw.triangle #([0,0,0], [50,50,0], [0,50,0]) #([255,255,0], [0,255,255], [0,255,0])
	gw.endTriangles() 
		
	-- Update the viewports
	gw.enlargeUpdateRect #whole
	gw.updateScreen()

)

registerRedrawViewsCallback li
#4

Thanks for your help, but read my previous post.
The problem is related to polygon hpolygon and wpolygon.
I hacked the projection to draw in 2d with triangle, but is something that can works only in sdk, not in maxscript.

#5

from the sdk for hPolygon

Point3 *rgb

The color values at the vertices. The rendering mode must include GW_ILLUM for these values to be used.

Note: The use of these colors is not supported under the OpenGL driver. The rgb values are ignored. Only the current material is taken into consideration. (This is how OpenGL works.)
#6

Already done, tested GW_ILLUM flag with different drivers opengl, directx and software raster. I tested with different 3dsmax version from 2014 until the last one, and the result is always the same. As I told you I fixed using triangle functions. I sent an email to the Autodesk to show them the problem and fix at least the documentation. A warning on these functions should be really appreciate by the developers.