Re: D2D/GDI+ Interop Problem - Graphics Discussion Boards

How to create complex 3d Objects with direct3d?

Member 1226818310-Apr-16 7:17

10-Apr-16 7:17

I would like to model the 3d object, consisted of two parts (A1 and A2). The angle between A1 and A2 is 150°. A1 and A2 are cylinders. The 3D object (A1 and A2) is lying on the XY plane.
I would like to rotate the 3d object around the A1 axis. The render plane has to be XZ. I don’t know how to rotate the 3d object around A1 axis. I use different combinations of the following functions:

D3DXMatrixRotationY(&R11, D3DX_PI * D3DXToRadian(0));
D3DXMatrixRotationAxis(&A1,  &D3DXVECTOR3 (0.0f, 1.0f, 0.0f), D3DXToRadian(30));
D3DXMatrixRotationZ(&R12, D3DXToRadian(20));
D3DXMatrixTranslation(&T11, 20.0f, 5.0f, 0.0f);
D3DXMatrixRotationX(&R13, D3DXToRadian(40));
HR(gd3dDevice->SetTransform(D3DTS_WORLD, &(R11 * A1 * R13/* * T11 * R13*/)));

Unfortunately I don’t understand how to create a child object (A2). When I rotate the object A1, the child object A2 has to be rotated automatically around the A1 axis.

Could you help to resolve the problem?

Regards

How to render multiple 3D objects separately? Pin

Member 1226818327-Mar-16 5:24

Member 12268183

27-Mar-16 5:24

I would like to control two 3D objects separately using direct3d library.

I drawn one cube and one cylinder. Unfortunately when I move the cube by the keyboard, I move the cylinder too. How to move only one of the 3d objects?

Regards

My code is here:

#include <windows.h>
#include "CubeDemo.h"
#include "d3dApp.h"
#include "GfxStats.h"
#include "Vertex.h"
#include "DirectInput.h"
#include <crtdbg.h>
#include <list>
#include "d3dUtil.h"
CubeDemo::CubeDemo(HINSTANCE hInstance, std::string winCaption, 
		D3DDEVTYPE devType, DWORD requestedVP)
		: D3DApp(hInstance, winCaption,	devType, requestedVP), MAX_SPEED(1500.0f), ACCELE(1000.0f)
{
	mGfxStats = new GfxStats();
	// 10 units from origin.
	mCameraRadius = 10.0f;
	// Somewhere in the 3rd quadrant of xz-plane.
	mCameraRotationY = 1.2 * D3DX_PI;
	xPos = 0.0f;
	yPos = 0.0f;
	// 5 units off the ground.
	mCameraHeight = 1.0f;
	HR(D3DXCreateCylinder(gd3dDevice, 4.0f, 5.0f, 6.0f, 10, 4, &mCylinder, 0));
	// If you look at the drawCylinders and drawSpheres functions, you see
	// that we draw 14 cylinders and 14 spheres.
	int numCylVerts    = mCylinder->GetNumVertices() * 14;
	int numCylTris     = mCylinder->GetNumFaces()    * 14;
 
	mGfxStats->addVertices(mNumGridVertices);
	mGfxStats->addVertices(numCylVerts);
	mGfxStats->addTriangles(mNumGridTriangles);
	mGfxStats->addTriangles(numCylTris);
 
	buildGeoBuffers();
	buildFX();
	buildVertexBuffer();
	buildIndexBuffer();
	onResetDevice();
	InitAllVertexDeclarations();
	checkDeviceCaps();
}
void CubeDemo::buildFX()
{
	// Create the FX from a .fx file.
	ID3DXBuffer* errors = 0;
	HR(D3DXCreateEffectFromFile(gd3dDevice, "transform.fx", 
		0, 0, D3DXSHADER_DEBUG, 0, &mFX, &errors));
	if( errors )
		MessageBox(0, (char*)errors->GetBufferPointer(), 0, 0);
	// Obtain handles.
	mhTech = mFX->GetTechniqueByName("TransformTech");
	mhWVP  = mFX->GetParameterByName(0, "gWVP");
}
bool CubeDemo::checkDeviceCaps()
{
	D3DCAPS9 caps;
	HR(gd3dDevice->GetDeviceCaps(&caps));
	if (caps.VertexShaderVersion < D3DVS_VERSION(3, 0))
		return false;
	if (caps.VertexShaderVersion < D3DPS_VERSION(3, 0))
		return true;
}
void CubeDemo::drawCylinders()
{
	D3DXMATRIX T, R;
	D3DXMatrixRotationX(&R, D3DX_PI * 0.5f);
	int z = 30;
 
	D3DXVECTOR3 pos(100, 0, 0);
	D3DXVECTOR3 target(0.0f, 0.0f, 0.0f);
	D3DXVECTOR3 up(0.0f, 1.0f, 0.0f);
	D3DXMatrixLookAtLH(&mView, &pos, &target, &up);
		D3DXMatrixTranslation(&T, -100.0f, 3.0f, (float)z);
		HR(mFX->SetMatrix(mhWVP, &(R * T * mView * mProj)));
		HR(mFX->CommitChanges());
		HR(mCylinder->DrawSubset(0));
}
void CubeDemo::buildVertexBuffer()
{
	// Obtain a pointer to a new vertex buffer.
	HR(gd3dDevice->CreateVertexBuffer(8 * sizeof (VertexPos), D3DUSAGE_WRITEONLY, 0, D3DPOOL_MANAGED, &mVB, 0));
	// Now lock it to obtain a pointer to its internal data,
	// and write the cube's vertex data.
	VertexPos* v = 0;
	HR(mVB->Lock(0, 0, (void**)&v, 0));
	v[0] = VertexPos(-1.0f, -1.0f, -1.0f);
	v[1] = VertexPos(-1.0f, 1.0f, -1.0f);
	v[2] = VertexPos( 1.0f, 1.0f, -1.0f);
	v[3] = VertexPos( 1.0f, -1.0f, -1.0f);
	v[4] = VertexPos(-1.0f, -1.0f, 1.0f);
	v[5] = VertexPos(-1.0f, 1.0f, 1.0f);
	v[6] = VertexPos( 1.0f, 1.0f, 1.0f);
	v[7] = VertexPos( 1.0f, -1.0f, 1.0f);
	HR(mVB->Unlock());
}
 
void CubeDemo::buildIndexBuffer()
{
	// Obtain a pointer to a new index buffer.
	HR(gd3dDevice->CreateIndexBuffer(36 * sizeof(WORD),	D3DUSAGE_WRITEONLY, D3DFMT_INDEX16, D3DPOOL_MANAGED, &mIB, 0));
	// Now lock it to obtain a pointer to its internal data,
	// and write the cube's index data.
	WORD* k = 0;
	HR(mIB->Lock(0, 0, (void**)&k, 0));
 
	// Front face.
	k[0] = 0; k[1] = 1; k[2] = 2;
	k[3] = 0; k[4] = 2; k[5] = 3;
	
	// Back face.
	k[6] = 4; k[7] = 6; k[8] = 5;
	k[9] = 4; k[10] = 7; k[11] = 6;
	
	// Left face.
	k[12] = 4; k[13] = 5; k[14] = 1;
	k[15] = 4; k[16] = 1; k[17] = 0;
	
	// Right face.
	k[18] = 3; k[19] = 2; k[20] = 6;
	k[21] = 3; k[22] = 6; k[23] = 7;
	
	// Top face.
	k[24] = 1; k[25] = 5; k[26] = 6;
	k[27] = 1; k[28] = 6; k[29] = 2;
	
	// Bottom face.
	k[30] = 4; k[31] = 0; k[32] = 3;
	k[33] = 4; k[34] = 3; k[35] = 7;
	
	HR(mIB->Unlock());
}
 
CubeDemo::~CubeDemo()
{
	delete mGfxStats;
	ReleaseCOM(mVB);
	ReleaseCOM(mIB);
	ReleaseCOM(mCylinder);
	DestroyAllVertexDeclarations();
}
 
void CubeDemo::onLostDevice()
{
	mGfxStats->onLostDevice();
}
 
void CubeDemo::onResetDevice()
{
	mGfxStats->onResetDevice();
	buildProjMtx();
}
 
void CubeDemo::buildProjMtx()
{
	float w = (float)md3dPP.BackBufferWidth;
	float h = (float)md3dPP.BackBufferHeight;
	D3DXMatrixPerspectiveFovLH(&mProj, D3DX_PI * 0.25f, w/h,
		1.0f, 5000.0f);
}
 
void CubeDemo::updateScene(float dt)
{
	// One cube has 8 vertices and 12 triangles.
	mGfxStats->setVertexCount(8);
	mGfxStats->setTriCount(12);
	mGfxStats->update(dt);
	// Get snapshot of input devices.
	gDInput->poll();
	// Check input.
	if( gDInput->keyDown(DIK_W) )
		xPos = xPos + 0.001f;
	if( gDInput->keyDown(DIK_S) )
		xPos = xPos - 0.001f;
	if( gDInput->keyDown(DIK_A) )
		yPos = yPos - 0.001f;
	if( gDInput->keyDown(DIK_D) )
		yPos = yPos + 0.001f;
	// Divide by 50 to make mouse less sensitive.
	mCameraRotationY += gDInput->mouseDX() / 50.0f;
	mCameraRadius += gDInput->mouseDY() / 50.0f;
	// If we rotate over 360 degrees, just roll back to 0
	if( fabsf(mCameraRotationY) >= 2.0f * D3DX_PI )
		mCameraRotationY = 0.0f;
	// Don't let radius get too small.
	if( mCameraRadius < 5.0f )
		mCameraRadius = 5.0f;
	buildViewMtx();
}
 

	
void CubeDemo::buildViewMtx()
{
	D3DXVECTOR3 pos(0, 0, 100);
	D3DXVECTOR3 target(0.0f, 0.0f, 0.0f);
	D3DXVECTOR3 up(1.0f, 0.0f, 0.0f);
	D3DXMatrixLookAtLH(&mView, &pos, &target, &up);
}
 
void CubeDemo::drawScene()
{
	// Clear the back buffer and depth buffer.
	HR(gd3dDevice->Clear(0, 0,
		D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER, 0xffffffff, 1.0f, 0));
	HR(gd3dDevice->BeginScene());
	// Let Direct3D know the vertex buffer, index buffer, and vertex
	// declaration we are using.
	
	HR(gd3dDevice->SetStreamSource(0, mVB, 0, sizeof(VertexPos)));
	HR(gd3dDevice->SetIndices(mIB));
	HR(gd3dDevice->SetVertexDeclaration(VertexPos::Decl));
	
	// Setup the rendering FX
	HR(mFX->SetTechnique(mhTech));
	// World matrix is identity.
	D3DXMATRIX W;
	D3DXMatrixIdentity(&W);
	HR(gd3dDevice->SetTransform(D3DTS_WORLD, &W));
	HR(gd3dDevice->SetTransform(D3DTS_VIEW, &mView));
	HR(gd3dDevice->SetTransform(D3DTS_PROJECTION, &mProj));
 
	D3DXMATRIX matTranslate;    // a matrix to store the translation information

// build a matrix to move the model 12 units along the x-axis and 4 units along the y-axis// store it to matTranslate
	D3DXMatrixTranslation(&matTranslate, xPos, yPos, 0.0f);
// tell Direct3D about our matrix
HR(gd3dDevice->SetTransform(D3DTS_WORLD, &matTranslate));
	HR(gd3dDevice->SetRenderState(D3DRS_FILLMODE, D3DFILL_WIREFRAME));
	HR(gd3dDevice->DrawIndexedPrimitive(
		D3DPT_TRIANGLELIST, 0, 0, 8, 0, 12));
	drawCylinders();
	HR(gd3dDevice->EndScene());
	// Present the back buffer.
	HR(gd3dDevice->Present(0, 0, 0, 0));
}
 
void CubeDemo::buildGeoBuffers()
{
	std::vector<D3DXVECTOR3> verts;
	std::vector<DWORD> indices;
	GenTriGrid(100, 100, 1.0f, 1.0f, D3DXVECTOR3(0.0f, 0.0f, 0.0f), verts, indices);
	// Save vertex count and triangle count for DrawIndexedPrimitive arguments.
	mNumGridVertices  = 100*100;
	mNumGridTriangles = 99*99*2;
	// Obtain a pointer to a new vertex buffer.
	HR(gd3dDevice->CreateVertexBuffer(mNumGridVertices * sizeof(VertexPos), 
		D3DUSAGE_WRITEONLY,	0, D3DPOOL_MANAGED, &mVB, 0));
 
	// Now lock it to obtain a pointer to its internal data, and write the
	// grid's vertex data.
	VertexPos* v = 0;
	HR(mVB->Lock(0, 0, (void**)&v, 0));
 
	for(DWORD i = 0; i < mNumGridVertices; ++i)
		v[i] = verts[i];
	HR(mVB->Unlock());
	// Obtain a pointer to a new index buffer.
	HR(gd3dDevice->CreateIndexBuffer(mNumGridTriangles*3*sizeof(WORD), D3DUSAGE_WRITEONLY,
		D3DFMT_INDEX16, D3DPOOL_MANAGED, &mIB, 0));
	// Now lock it to obtain a pointer to its internal data, and write the
	// grid's index data.
	WORD* k = 0;
	HR(mIB->Lock(0, 0, (void**)&k, 0));
 
	for(DWORD i = 0; i < mNumGridTriangles*3; ++i)
		k[i] = (WORD)indices[i];
 
	HR(mIB->Unlock());
}

modified 15-Jul-16 4:34am.

Re: How to render multiple 3D objects separately? Pin

Graham Breach28-Mar-16 0:29

Graham Breach

28-Mar-16 0:29

You're setting the world transform, then drawing the cube followed by the cylinder.

Either draw the cylinder before applying the world transform for the cube, or apply a new world transform before drawing the cylinder.

Re: How to render multiple 3D objects separately? Pin

Member 122681833-Apr-16 7:41

Member 12268183

3-Apr-16 7:41

Thank you very much for your help.

Re: How to render multiple 3D objects separately? Pin

Forrest9012-Jul-16 2:36

Forrest90

12-Jul-16 2:36

Thank you !

Re: How to render multiple 3D objects separately? Pin

Romain3413-Jul-16 23:33

Romain34

13-Jul-16 23:33

D2D/GDI+ Interop Problem

Member 1171275327-Feb-16 20:21

Member 11712753

27-Feb-16 20:21

I have recently read an article about Direct2D and GDI Interop from MSDN and I just wanted to make an attempt on that.

The problem with my code is that there is no (D2D) red rectangles at the output file but it does not produce any compile-time or runtime errors.

That really makes me frustrated as I have already spent my valuable weekend for that without any progress. Cry | :((

Any help is appreciated. Rose | [Rose]

Ref. article: Direct2D and GDI Interoperability Overview (Windows)[^]

Code block:

C++

#include<d2d1_2.h>
#include<gdiplus.h>
#include<iostream>
#include<wincodec.h>

#pragma comment(lib, "d2d1.lib")
#pragma comment(lib, "GdiPlus.lib")
#pragma comment(lib, "Windowscodecs.lib")

using namespace std;

void main()
{
	HRESULT hr;
	ID2D1Factory* factory;
	ID2D1DCRenderTarget* target;
	ID2D1SolidColorBrush* brush;

	D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED, &factory);

	// initialize GDI+
	ULONG_PTR token;
	Gdiplus::GdiplusStartup(&token, new Gdiplus::GdiplusStartupInput(), nullptr);


	auto image = new Gdiplus::Image(L"C:\\temp\\test.jpg");

	auto g = Gdiplus::Graphics::FromImage(image);

	auto prop = D2D1_RENDER_TARGET_PROPERTIES{
		D2D1_RENDER_TARGET_TYPE_HARDWARE ,
		D2D1_PIXEL_FORMAT{ DXGI_FORMAT_B8G8R8A8_UNORM , D2D1_ALPHA_MODE_PREMULTIPLIED },
		144.0f,
		144.0f,
		D2D1_RENDER_TARGET_USAGE_GDI_COMPATIBLE,
		D2D1_FEATURE_LEVEL_DEFAULT
	};


	hr = factory->CreateDCRenderTarget(&prop, &target);

	auto rect = RECT{ 0L,0L,800L, 600L };

	cout << boolalpha << (image == nullptr) << boolalpha << (g == nullptr) << endl;

	HDC deviceContext = g->GetHDC();

	// binds D2D device context to GDI+ device context.
	target->BindDC(deviceContext, &rect);

	// DrawRectangle using D2d
	target->BeginDraw();

	target->CreateSolidColorBrush(D2D1::ColorF(D2D1::ColorF::Red, 1.0f), &brush);
	target->DrawRectangle(D2D1_RECT_F{ 5.0f,5.0f,10.0f,10.0f }, brush);
	target->DrawRectangle(D2D1_RECT_F{ 10.0f,10.0f,30.0f,30.0f }, brush);

	hr = target->EndDraw();

	cout << boolalpha << SUCCEEDED(hr) << endl;

	CLSID pngEncoderClsId = { 0x557cf406, 0x1a04, 0x11d3,{ 0x9a,0x73,0x00,0x00,0xf8,0x1e,0xf3,0x2e } };

	// Transcode and save as PNG image file
	image->Save(L"C:\\temp\\output.png", &pngEncoderClsId);

	Gdiplus::GdiplusShutdown(token);
}

Re: D2D/GDI+ Interop Problem

Richard MacCutchan27-Feb-16 22:11

Richard MacCutchan

27-Feb-16 22:11

You are trying to do this in a console application. I do not think that will work since you have no Window to draw on. You need to create a Windows app to do it.

Direct3d Game programming error

Member 1226818323-Feb-16 23:12

Member 12268183

23-Feb-16 23:12

Hi
I use the following link for starting an application with direct3d:
file:///D:/SoftwareProjects/Help/A%20Primer%20of%20DirectX%20Basics%20and%20the%20DirectX3D%20API%20-%20CodeProject.htm

I use this book too: Introduction to 3D Game Programming, written by Frank Luna

I use Microsoft Visual Studio 2012 C++ and Microsoft DirectX SDK (June 2010).

I have the following errors during debug of my application.

in the file DirectInput.cpp at the following lines:

HR(mKeyboard->Acquire());
HR(mMouse->Acquire());

The error is: one box appears with the following text:
Unexpected error encountered.
X Error
with buttons: YES/ NO

I don't know how to attach a screenshot of the error to the message.

Could you please help me to resolve the problem.

Also in DirectInput.h

I changed the declaration of the following:
extern DirectInput* gDInput;
in static DirectInput* gDInput;

Regards