I'm having trouble understanding how directX deals with the objects being called and when it renders each one.

In a nutshell is it like this?:

1. set render states

2. set vertex format

3. load vertex buffers

3.1. create vertex buffer (lock buffer)

3.2. fill the buffer with array data

3.3. Copy array data and then unlock buffer.

4. Draw to scene

5. Present data

So do I create classes to load multiple models at step 3 before step 4?

Or does each model have to go through the process up to draw before present is called at step 5?

Help would be greatly appreciated!

nice one, thanks for clearing that up.

Okay one more lol, getting lost in how to implement what I need using derived classes.

So I can lay it out like this then:

WinMain -> calls AssetsClass;

during windows message check:

calls AssetsClass->Update();

AssetsClass->Render();

DirectxBaseInitialization (class)

virtual Render();

virtual Update();

AssetsClass : public DirectxBaseInitialization

virtual Update();

Then I can wrap all my code in the following classes Sprites, Font's & 3Dmodels. All 'public DirectxBaseInitialization'.

Then it all waterfalls back down the pipeline to the render call that is called by AssetsClass.

Or is that barking up the wrong tree?

would I have to make DirectxBaseInitialization & AssetsClass's Render() function a pure virtual one to avoid it calling wrong?

Okay I've gone away and RTFM a bit more,

I'm to the point where:

• I've tied object creation down to the Vertex buffer & Index buffer in initialization
• Declaration of the objects world Scale * rotation * translation in updating your scene
• And drawing the object using the loaded textures, texture samplers & the vertex shader buffer in the DrawScene stage

I'm currently trying to encapsulate object creation (cubes) into a vector, problem is it's failing at runtime due to the CubesClass containing XMMATRIX variables.

How do I get round this? and why wont Vector allow a class containing them?

problem is it's failing at runtime due to the CubesClass containing XMMATRIX variables.

why wont Vector allow a class containing them?

How do I get round this?

#ifndef _C_MY_OBJECT_H_
#define _C_MY_OBJECT_H_

#include <xnamath.h>

class cMyObject
{
public:
    cMyObject() :    posX(0.0f),
                    posY(0.0f),
                    posZ(0.0f),
                    rot(0.0f),
                    scaleMod(0.3f),
                    scaleFull(false) {};
    ~cMyObject() {};

    //void DeclareMyObject(float rotPassed, float posXnew, float posYnew, float posZnew)
    void DeclareMyObject(    float newScale,
                            float rotIn,
                            float posXnew,
                            float posYnew,
                            float posZnew )
    {
        currCubeWorldMat = XMMatrixIdentity();                                            //Reset current cubes coords

        Scale = XMMatrixScaling( newScale, newScale, newScale );

        XMVECTOR rotaxis = XMVectorSet( 0.0f, 0.0f, 1.0f, 0.0f );                    //Define objects world space matrix
        Rotation = XMMatrixRotationAxis( rotaxis, rotIn );
        Translation = XMMatrixTranslation( posXnew, posYnew, posZnew );

        //SRT scale, rot, translation
        currCubeWorldMat = Scale * Rotation * Translation;                                //Set cube1's world space using the transformations
    }

    XMMATRIX ReturnWorldMatrix() { return currCubeWorldMat; }

    /*
    void DrawMyObject(    ID3D11DeviceContext* d3d11DevCon,
                            XMMATRIX& WVP,
                            cbPerObject& cbPerObjectBuffer,
                            cbPerObject& cbPerObj,
                            ID3D11ShaderResourceView* TextureRef,
                            ID3D11SamplerState* TexSamplerRef,
                            XMMATRIX& camView,
                            XMMATRIX& camProjection)
    {
        WVP = currCubeWorldMat * camView * camProjection;
        cbPerObj.WVP = XMMatrixTranspose(WVP);
        d3d11DevCon->UpdateSubresource( cbPerObjectBuffer, 0, NULL, &cbPerObj, 0, 0 );
        d3d11DevCon->VSSetConstantBuffers( 0, 1, &cbPerObjectBuffer );
        d3d11DevCon->PSSetShaderResources( 0, 1, &TextureRef );
        d3d11DevCon->PSSetSamplers( 0, 1, &TexSamplerRef );
    
        //Draw the cube
        d3d11DevCon->DrawIndexed( 36, 0, 0 );
    }
    */

private:
    XMMATRIX    currCubeWorldMat;

    XMMATRIX    Scale,
                Rotation,
                Translation;

    float        posX,
                posY,
                posZ,
                rot,
                scaleMod;

    bool        scaleFull;
};

#endif

//declarations at the top of main.cpp

std::vector<cMyObject> vCubes;

in the main update function

void UpdateScene()
{
    float newX = 0.0f;

    for(int i = 0; i < 3; i++)
    {
        vCubes.push_back( cMyObject( ) );
        vCubes[i].DeclareMyObject( newX, 0.0f, 0.0f );
        newX += 0.3f;
    }
}

in the drawscene function when I swap to this function i get the following error:

1>C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\include\vector(870): error C2719: '_Val': formal parameter with __declspec(align('16')) won't be aligned
1> main.cpp(103) : see reference to class template instantiation 'std::vector<_Ty>' being compiled

for(int i = 0; i < 3; i++)
    {
        WVP = vCubes[i].ReturnWorldMatrix() * camView * camProjection;
        cbPerObj.WVP = XMMatrixTranspose(WVP);
        d3d11DevCon->UpdateSubresource( cbPerObjectBuffer, 0, NULL, &cbPerObj, 0, 0 );
        d3d11DevCon->VSSetConstantBuffers( 0, 1, &cbPerObjectBuffer );
        d3d11DevCon->PSSetShaderResources( 0, 1, &CubesTexture );
        d3d11DevCon->PSSetSamplers( 0, 1, &CubesTexSamplerState );

        //Draw the cube
        d3d11DevCon->DrawIndexed( 36, 0, 0 );
    }

The code works fine if I split up the variables into seperate calls eg:

//initial declarations
cMyObject object1;
cMyObject object2;
cMyObject object3;
 
//in the update scene
object1.DeclareMyObject( scaleMod, rot, -2.0f, 0.0f, 0.0f );
object2.DeclareMyObject( scaleMod, rot, 0.0f, 3.0f, 2.0f );
object3.DeclareMyObject( scaleMod, rot, 4.0f, 1.0f, 0.0f );
 
//in the draw call
WVP = object1.ReturnWorldMatrix() * camView * camProjection;
    cbPerObj.WVP = XMMatrixTranspose(WVP);
    d3d11DevCon->UpdateSubresource( cbPerObjectBuffer, 0, NULL, &cbPerObj, 0, 0 );
    d3d11DevCon->VSSetConstantBuffers( 0, 1, &cbPerObjectBuffer );
    d3d11DevCon->PSSetShaderResources( 0, 1, &CubesTexture2 );
    d3d11DevCon->PSSetSamplers( 0, 1, &CubesTexSamplerState2 );
   
    //Draw the cube
    d3d11DevCon->DrawIndexed( 36, 0, 0 );
//code repeated with 2/3 etc

I was trying to implement:

object1.DrawMyObject( d3d11DevCon, WVP, cbPerObjectBuffer, cbPerObj, CubesTexture2, CubesTexSamplerState2, camView, camProjection );

But that does the same so I seperated it from the class to try identify where the error was.