Software Renderer, Where to start
Author
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)
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
Rotating a Point on Y axis
Rotating a Point on Z axis
Translating a point by x,y,z
---------------------------
I may be getting older, but I refuse to grow up
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 00 c -s 0 0 s c 00 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
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.
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.
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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