Graphics

Re: How to extract geometry from Google Earth?

4-Oct-16 4:48

You first go to the Google developer website and research how and what information they provide.

leon de boer18-Oct-16 10:48

leon de boer

18-Oct-16 10:48

You start with the public source the SRTM 90m data

CGIAR-CSI SRTM 90m DEM Digital Elevation Database[^]

Then you need to sort out what you want to do.

For example there is already a python import library addon for blender to display the data
Import SRTM (.hgt) · vvoovv/blender-geo Wiki · GitHub[^]

In vino veritas

D2D + WPF + SwapChain = ???

Max Dhom17-May-16 1:56

Max Dhom

17-May-16 1:56

Hi together,
i am currently working on a WPF-based software for some basic CAD-funtionality. I herefore used this example Direct2DonWPF for using DirectX / D2D in a WPF control, which is working fine. I can draw what i want and the performance is good - EXCEPT the flickering when i draw to fast (>25fps). With GDI+ i was able to activate Doublebuffering and everything was fine. Now i'd need to implement the SwapChain from DirectX to get rid of this problem. Unfortunately, i found many tutorials and examples dealing with this issue, but none of them implements the SwapChain and D2D in WPF. I tried hours on hours to get it working, but on some random point i can't get it working.

Could someone help me understanding how to implement the SwapChain in the previously linked example, using D3DImage control etc.?

Thanks for your help,
Max

How to create complex 3d Objects with direct3d?

Member 1226818310-Apr-16 7:17

How to render multiple 3D objects separately? Pin

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

Member 1226818327-Mar-16 5:24

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

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.

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

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

3-Apr-16 7:41

Thank you very much for your help.

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

Direct3d Game programming error

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.

Member 1226818323-Feb-16 23:12

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

Richard Deeming24-Feb-16 2:05

Richard Deeming

24-Feb-16 2:05

Member 12268183 wrote:
file:///D:/SoftwareProjects/Help/A%20Primer%20of%20DirectX%20Basics%20and%20the%20DirectX3D%20API%20-%20CodeProject.htm

You do realise we can't access your computer, right? A link to an HTML file stored on your computer is absolutely useless to us. D'Oh! | :doh:

"These people looked deep within my soul and assigned me a number based on the order in which I joined."
- Homer

Member 1226818324-Feb-16 21:15

24-Feb-16 21:15

I appologize. This is the link where I took the example:

A Primer of DirectX Basics and the DirectX3D API[^]

Regards

Pete O'Hanlon24-Feb-16 23:03

Pete O'Hanlon

24-Feb-16 23:03

You should ask your question on the forum at the end of the article. It's the best place to get help.

This space for rent

Archard25215-Jul-16 1:06

Archard252

15-Jul-16 1:06

For rent ?

Richard MacCutchan24-Feb-16 2:19

24-Feb-16 2:19

Changing a header file declaration usually ends in tears, unless you really understand the implications.

Pete O'Hanlon24-Feb-16 3:16

Pete O'Hanlon

24-Feb-16 3:16

Member 12268183 wrote:
I changed the declaration of the following:
extern DirectInput* gDInput;
in static DirectInput* gDInput;

Do you think there might be a connection?

This space for rent

Member 1226818324-Feb-16 21:17

24-Feb-16 21:17

I don't know. If I put extern DirectInput* gDInput I receive the following error during the build process:

1>  Generating Code...
1>CubeDemo.obj : error LNK2001: unresolved external symbol "class DirectInput * gDInput" (?gDInput@@3PAVDirectInput@@A)
1>SpriteDemo.obj : error LNK2001: unresolved external symbol "class DirectInput * gDInput" (?gDInput@@3PAVDirectInput@@A)
1>winmain.obj : error LNK2019: unresolved external symbol "class DirectInput * gDInput" (?gDInput@@3PAVDirectInput@@A) referenced in function "public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > & __thiscall std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> >::assign(char const *)" (?assign@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV12@PBD@Z)
1>D:\SoftwareProjects\C++\book_ex1\Debug\book_ex1.exe : fatal error LNK1120: 1 unresolved externals
========== Rebuild All: 0 succeeded, 1 failed, 0 skipped ==========

Richard MacCutchan24-Feb-16 22:40

24-Feb-16 22:40

The linker is merely telling you that you forgot to provide a definition of the object that has been declared extern. You need to provide a line such as the following in one (and only one) of your source files:

C++

DirectInput * gDInput = // add initialiser here, or in later code.

Member 1226818325-Feb-16 1:40

25-Feb-16 1:40

Hi
I add extern DirectInput* gDInput; in DirectInput.h file. At the beginning of the file DirectInput.cpp I add DirectInput* gDInput = 0;

After the build process I received no errors. But during the debug process I still have the same error on the line in DirectInput.cpp:

HR(mKeyboard->Acquire());

One message box appears with the following message:
Unexpected error encountered: XFile with two buttons Yes/No

Regards

Richard MacCutchan25-Feb-16 2:01

25-Feb-16 2:01

Then you need to use your debugger to find out why the error occurred. Randomly changing source code is not a very good way to try and resolve problems.

Member 1226818325-Feb-16 4:21