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VisualB4BigD

Software Renderer, Where to start

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I want to know the formulas for: Rotating a Point on X axis Rotating a Point on Y axis Rotating a Poing on Z axis Moving a Point X Y and Z Drawing a 3D Point (X,Y,Z) on a 2D screen (X,Y) Thanx Horny Farmer (Jolly Rancher)

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I want you to reconsider your way of asking politely.

Depending on how you''re used to do matrix*vector multiplications either the following matrices or their transposeds


For all: s = sin(angle), c = cos(angle)

Rotating a Point on X axis

1 0 0 0
0 c -s 0
0 s c 0
0 0 0 1


Rotating a Point on Y axis

c 0 s 0
0 1 0 0
-s 0 c 0
0 0 0 1


Rotating a Point on Z axis

c -s 0 0
s c 0 0
0 0 1 0
0 0 0 1


Translating a point by x,y,z

1 0 0 0
0 1 0 0
0 0 1 0
x y z 1




---------------------------
I may be getting older, but I refuse to grow up

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Check the ''Articles & Resources'' section on this site. Once there click the ''Graphics'' link. Any resource you could want on that subject should be found there.

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What the heck, I''ll post it any way:

3D -> 2D

X = XRES / 2 * (X / Z) + XRES / 2
Y = YRES / 2 * (Y / Z) + YRES / 2

There you are
Devide x and y with z, and multiply by half of resolution, and add half of resolution to center. I''m not in the mood of explaination.

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