[fpc-pascal] Calculating Pixels to represent 3D coordinates

[Thomas Young]

This is an isometric projection I use:
var H1 = (Y - X) * 0.86602 + ScreenOrgin_H;
var V1 = (X + Y) * 0.5 - Z + ScreenOrgin_V;

Thomas Young
330-256-7064
Sent from my iPhone

> On Sep 17, 2019, at 4:53 PM, Gustavo Enrique Jimenez <gejimenez at gmail.com> wrote:
> 
> A simple transformation is:
> 
> P3D=(X,Y,Z)
> P2D=(x,y)
> 
> x=X+Y*0.707
> y=Y*0.707+Z
> 
> I did not tried it, but I think that this is the transformation that
> you are looking for.
> 
> 
> Gustavo
> 
> El mar., 17 sept. 2019 a las 17:37, James Richters
> (<james at productionautomation.net>) escribió:
>> 
>>> What exactly are you trying to do? Usually if you’re doing 3D this all happens on the GPU and you get back a color/depth buffer. Maybe you need to know where a 2D coordinate is in 3D space?
>> 
>> What I'm trying to do is much simpler than rendering a 3D object..  All I'm trying to do is display a 3D line drawing or wireframe on the screen.  I don't need it to dynamically rotate or anything, and it doesn't need to show any surfaces, textures, lighting, reflections, or shadows, just give a representation of the XYZ points and lines connecting 2 pair of XYZ coordinates on the screen.   The purpose of this is to show a 3D representation of a CNC tool path including the Z movements.
>> 
>> James
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