HappySqurriel on 30 July 2007
| alpha_dk said: 4-D graphics (specifically, vertex4[insert type here]) exist in the OpenGL specifications. The PS3 uses OpenGL. Thus, the PS3 has 4d graphics. Although I am not versed in DirectX, I feel I can say with a reasonable degree of confidence that an analogous call exists in it. Can anyone more versed than I am (that is, versed at all) in DirectX [10] confirm or deny this? In any case, the PS3 does have 4d graphics, and can we *please* stop using this bit of marketing fluff to make arguments either for or against any console? |
Technically speaking the fact that you use 4 co-ordinates to specify a point in projective geometry has absoluetly nothing to do with it being a 4 dimensional space; it still is (in fact) a three dimensional space because one entire dimension actually represents duplicates ...
Basically, a point in space is:
ax + by + cz + 1w
if you change the co-efficient of w (to d) this represents the point:
a/dx+ b/dy + c/dz + 1w
The only exception to this rule is when d=0 which represents the three dimensional vector
ax + by + cz
