text stringlengths 0 234 |
|---|
-------------- |
-- Material -- |
-------------- |
if First_Face |
or else Previous_face.skin = invisible |
or else fa.skin /= Previous_face.skin |
or else (fa.skin = Previous_face.skin |
and then fa.material /= Previous_face.material) |
then |
case fa.skin is |
when material_only | material_texture => |
Disable (COLOR_MATERIAL); |
Set_Material (fa.material); |
when others => |
Set_Material (GL.Materials.neutral_material); |
end case; |
end if; |
------------ |
-- Colour -- |
------------ |
if First_Face |
or else Previous_face.skin = invisible |
or else fa.skin /= Previous_face.skin |
or else (fa.skin = Previous_face.skin |
and then (fa.colour /= Previous_face.colour |
or else fa.alpha /= Previous_face.alpha)) |
then |
case fa.skin is |
when material_only | material_texture => |
null; -- done above |
when colour_only | coloured_texture => |
Enable (COLOR_MATERIAL); |
ColorMaterial (FRONT_AND_BACK, AMBIENT_AND_DIFFUSE); |
Color ( |
red => fa.colour.Red, |
green => fa.colour.Green, |
blue => fa.colour.Blue, |
alpha => fa.alpha |
); |
when texture_only => |
Disable (COLOR_MATERIAL); |
when invisible => |
null; |
end case; |
end if; |
------------- |
-- Texture -- |
------------- |
if is_textured (fa.skin) then |
G3DT.Check_2D_texture (fa.texture, blending_hint); |
if blending_hint then |
fi.blending := True; |
-- 13 - Oct - 2006 : override the decision made at Pre_calculate. |
-- If texture data contains an alpha layer, we switch |
-- on transparency. |
end if; |
end if; |
if First_Face |
or else Previous_face.skin = invisible |
or else fa.skin /= Previous_face.skin |
or else (fa.skin = Previous_face.skin |
and then fa.texture /= Previous_face.texture) |
then |
case fa.skin is |
when texture_only | coloured_texture | material_texture => |
Enable (TEXTURE_2D); |
GL.BindTexture (GL.TEXTURE_2D, GL.Uint (Image_ID'Pos (fa.texture) + 1)); |
-- ^ superfluous ?!! |
when colour_only | material_only => |
Disable (TEXTURE_2D); |
when invisible => |
null; |
end case; |
end if; |
----------------------------- |
-- Blending / transparency -- |
----------------------------- |
if First_Face |
or else Previous_face.skin = invisible |
or else fi.blending /= Previous_face_Invariant.blending |
then |
if fi.blending then |
Enable (BLEND); -- See 4.1.7 Blending |
BlendFunc (sfactor => SRC_ALPHA, |
dfactor => ONE_MINUS_SRC_ALPHA); |
-- Disable (DEPTH_TEST); |
-- Disable (CULL_FACE); |
else |
Disable (BLEND); |
-- Enable (DEPTH_TEST); |
-- Enable (CULL_FACE); |
-- CullFace (BACK); |
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