> I have a 3D like the following:http://tabishfayyaz.googlepages.com/blackGraph.JPG
>
> How do I color them to give a picture like the following:http://tabishfayyaz.googlepages.com/colorGraph.JPG
>
> I create a mesh from a list of vertices. I heard coloring has
> something to do with normals but haven't been able to get my head
> working around that.

> On Aug 15, 3:50 pm, TFM gmail.com> wrote:
>

>> I have a 3D like the following:http://tabishfayyaz.googlepages.com/blackGraph.JPG

>

>> How do I color them to give a picture like the following:http://tabishfayyaz.googlepages.com/colorGraph.JPG

>

>> I create a mesh from a list of vertices. I heard coloring has
>> something to do with normals but haven't been able to get my head
>> working around that.

>
> Forget about normals for now. One of the easier ways to
> do this is to declare your vertex with colour information.
> Assuming Y is up, just set each vertex's colour based on
> its x-z position.
>
> Look in the sdk samples at "Tutorial 2: Vertices" (or
> 'Rendering Vertices' depending on which version of the
> sdk you have and where you are looking). It shows how
> a triangle with colour information is rendered. ...

>
> Yes I know how to set color of each vertex but I can't figure out how
> to give this color interpolation over a 3D surface
>
> I've tried the following with different results:
>
> http://tabishfayyaz.googlepages.com/strictlyColoredGraph.JPG
>
> The code which is used is this:
>
> if(x<0 && y<0)
> vertexPosColor = new CustomVertex.PositionColored(x, y, (float)z,
> Color.Blue.ToArgb() * Color.Magenta.ToArgb());
> else if(x<0 && y>0)
> vertexPosColor = new CustomVertex.PositionColored(x, y, (float)z,
> Color.Blue.ToArgb() * Color.Pink.ToArgb());
> else if(x>0 && y<0)
> vertexPosColor = new CustomVertex.PositionColored(x, y, (float)z,
> Color.Green.ToArgb() * Color.Yellow.ToArgb()); ...

> On Aug 16, 9:38 am, TFM gmail.com> wrote:
>
>
>
>
>

>> Yes I know how to set color of each vertex but I can't figure out how
>> to give this color interpolation over a 3D surface

>

>> I've tried the following with different results:

>

>>http://tabishfayyaz.googlepages.com/strictlyColoredGraph.JPG

>

>> The code which is used is this:

>

>> if(x<0 && y<0)
>> vertexPosColor = new CustomVertex.PositionColored(x, y, (float)z,
>> Color.Blue.ToArgb() * Color.Magenta.ToArgb());
>> else if(x<0 && y>0) ...

> On Aug 16, 12:25 pm, Geoffrey Summerhayes gmail.com> wrote:
>
>
>
>
>

>> On Aug 16, 9:38 am, TFM gmail.com> wrote:

>

>>> Yes I know how to set color of each vertex but I can't figure out how
>>> to give this color interpolation over a 3D surface

>

>>> I've tried the following with different results:

>

>>>http://tabishfayyaz.googlepages.com/strictlyColoredGraph.JPG

>

>>> The code which is used is this:

>

>>> if(x<0 && y<0)
>>> vertexPosColor = new CustomVertex.PositionColored(x, y, (float)z, ...

> On Aug 16, 3:33 pm, TFM gmail.com> wrote:
>
>
>

>> On Aug 16, 12:25 pm, Geoffrey Summerhayes gmail.com> wrote:

>

>>> On Aug 16, 9:38 am, TFM gmail.com> wrote:

>

>>>> Yes I know how to set color of each vertex but I can't figure out how
>>>> to give this color interpolation over a 3D surface

>

>>>> I've tried the following with different results:

>

>>>>http://tabishfayyaz.googlepages.com/strictlyColoredGraph.JPG

>

>>>> The code which is used is this:

>

>>>> if(x<0 && y<0)
>>>> vertexPosColor = new CustomVertex.PositionColored(x, y, (float)z, ...

>
> No I mean to say 4 corners of what ? I don't have square, I have a
> traingle, each square has 2 triangle.

> I'm using Managed DirectX, I don't understand your code. What is
> C1,C2....... ?

> On Aug 16, 7:15 pm, TFM gmail.com> wrote:
>
>
>

>> No I mean to say 4 corners of what ? I don't have square, I have a
>> traingle, each square has 2 triangle.

>
> Each what, what was that? Did I hear each SQUARE?
>
> http://tabishfayyaz.googlepages.com/strictlyColoredGraph.JPG
>
> Look, 4 corners.
>
> http://tabishfayyaz.googlepages.com/colorGraph.JPG
>
> I'm guessing about 25x25 or 625 vertices.
> With the corners coloured yellow, blue, green, and magenta.
>

>> I'm using Managed DirectX, I don't understand your code. What is ...

>
> oh you were talking about the 1 big square I thought you were talking
> about the little squares the whole graph is made up of :)
> Yes its 25x25.
>
> There seems to be a little problem with the casting stuff. I've
> changed r,g,b to float. Here is my code:
>
> float r, g, b;
> float a = (float)(4.0 * (1.0 - realX / 24.0) * (1.0 - realY / 24.0));
> float bb = (float)(4.0 * (realX / 24.0) * (1.0 - realY / 24.0));
> float c = (float)(4.0 * (1.0 - x / 24.0) * (y / 24.0));
> float d = (float)(4.0 * (realX / 24.0) * (realY / 24.0));
> r = (c1.R * a + c2.R * bb + c3.R * c + c4.R * d) / 4.0f;
> g = (c1.G * a + c2.G * bb + c3.G * c + c4.G * d) / 4.0f;
> b = (c1.B * a + c2.B * bb + c3.B * c + c4.B * d) / 4.0f;
>
> Color vColor = r*65536+g*256+b;
> vertexPosColor = new CustomVertex.PositionColored(realX,realY ,realZ, ...