哪位仁兄有用VB编的三维图形显示的程序

flyseagle 2004-10-22 02:16:52
哪位仁兄有用VB编的三维图形显示的程序
是图形显示,必要时可以进行旋转、放大、缩小等操作。
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fhvsbgmy 2004-10-31
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api 函数可以
xinliangyu 2004-10-29
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用directX编程还太陌生,不知哪里有相关资料?
doxob 2004-10-29
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'将后台绘图平面的尺寸保存到g_rcSrc中
With g_rcSrc
.Left = 0: .Top = 0
.Bottom = g_ddsd.lHeight
.Right = g_ddsd.lWidth
End With

Dim pcClipper As DirectDrawClipper

Set pcClipper = g_dd.CreateClipper(0)
pcClipper.SetHWnd Me.hWnd

MainBuffer.SetClipper pcClipper
End Sub

'InitD3D函数初始化Direct3D对象,包括3D设备、光源、视角以及材质
Sub InitD3D()
Dim d3d As Direct3D7
Dim ddsd As DDSURFACEDESC2

'从DirectDraw对象中获得Direct3D对象
Set d3d = g_dd.GetDirect3D

'获得DirectDraw对象的显示颜色深度,如果小于16位色,则程序出错退出
g_dd.GetDisplayMode ddsd
If ddsd.ddpfPixelFormat.lRGBBitCount <= 8 Then
MsgBox "本程序不支持颜色位数小于16bit的显示模式,程序将退出"
End
End If

On Error Resume Next
'首先尝试建立硬件3维设备对象(HAL)
Set Direct3DDevice = d3d.CreateDevice("IID_IDirect3DHALDevice", BackBuffer)
'如果Direct3DDevice为Nothing说明显示卡不支持硬件Direct3D设备
'尝试建立RGB3维设备。
If Direct3DDevice Is Nothing Then
Set Direct3DDevice = d3d.CreateDevice("IID_IDirect3DRGBDevice", BackBuffer)
End If

'定义视角区域
Dim VPDesc As D3DVIEWPORT7

VPDesc.lWidth = g_rcDest.Right - g_rcDest.Left
VPDesc.lHeight = g_rcDest.Bottom - g_rcDest.Top
VPDesc.minz = 0#
VPDesc.maxz = 1#
'设置Direct3DDevice对象的视角
Direct3DDevice.SetViewport VPDesc

'保存对视角的设置
With ViewPortRect(0)
.X1 = 0: .Y1 = 0
.X2 = VPDesc.lWidth
.Y2 = VPDesc.lHeight
End With
iViewSize = 4
End Sub

'InitDeviceObjects函数建立三维物体
Private Sub InitDeviceObjects()

'建立立方体的顶点数据
CreateCube g_vCube

'通过位图文件建立三个纹理表面
Set TextureSurface1 = CreateTextureSurface("t1.bmp")
Set TextureSurface2 = CreateTextureSurface("t2.bmp")
Set TextureSurface3 = CreateTextureSurface("t3.bmp")

'使用泛光源以及白色的普通材质
Dim mtrl As D3DMATERIAL7
'定义材质对光源的的反射属性,你可以尝试改变它们的值看一下材质
'的反射效果
mtrl.diffuse.r = 1#: mtrl.diffuse.g = 0#: mtrl.diffuse.b = 1#
mtrl.Ambient.r = 1#: mtrl.Ambient.g = 1#: mtrl.Ambient.b = 1#: mtrl.Ambient.a = 1
mtrl.emissive.r = 1#: mtrl.emissive.g = 0#: mtrl.emissive.b = 1#
mtrl.emissive.r = 1#: mtrl.specular.g = 1#: mtrl.specular.b = 1#
'将材质的清晰度设置为10
mtrl.power = 10
Direct3DDevice.SetMaterial mtrl

'设置Direct3DDevice的光源为泛光源,你可以尝试对SetRenderState函数的
'第一个参数使用不同的值,看看光源的效果。
Direct3DDevice.SetRenderState D3DRENDERSTATE_AMBIENT, _
g_dx.CreateColorRGBA(1#, 1#, 0#, 1#)

Dim matProj As D3DMATRIX

g_dx.IdentityMatrix matProj

Call g_dx.ProjectionMatrix(matProj, 1, 1000, pi / 4#)
Direct3DDevice.SetTransform D3DTRANSFORMSTATE_PROJECTION, matProj
End Sub

'CreateCube函数建立立方体的顶点数据
Private Sub CreateCube(vertices() As D3DVERTEX)
'一个立方体有6个面,每面有是一个正方形,有4个顶点,下面共定义了
'这6个面的24个顶点
g_dx.CreateD3DVertex -1, 1, -1, 0, 0, -1, 0, 0, vertices(0)
g_dx.CreateD3DVertex 1, 1, -1, 0, 0, -1, 1, 0, vertices(1)
g_dx.CreateD3DVertex -1, -1, -1, 0, 0, -1, 0, 1, vertices(2)
g_dx.CreateD3DVertex 1, -1, -1, 0, 0, -1, 1, 1, vertices(3)

g_dx.CreateD3DVertex -1, 1, 1, 0, 0, 1, 1, 0, vertices(4)
g_dx.CreateD3DVertex -1, -1, 1, 0, 0, 1, 1, 1, vertices(5)
g_dx.CreateD3DVertex 1, 1, 1, 0, 0, 1, 0, 0, vertices(6)
g_dx.CreateD3DVertex 1, -1, 1, 0, 0, 1, 0, 1, vertices(7)

g_dx.CreateD3DVertex -1, 1, 1, 0, 1, 0, 0, 0, vertices(8)
g_dx.CreateD3DVertex 1, 1, 1, 0, 1, 0, 1, 0, vertices(9)
g_dx.CreateD3DVertex -1, 1, -1, 0, 1, 0, 0, 1, vertices(10)
g_dx.CreateD3DVertex 1, 1, -1, 0, 1, 0, 1, 1, vertices(11)

g_dx.CreateD3DVertex -1, -1, 1, 0, -1, 0, 0, 0, vertices(12)
g_dx.CreateD3DVertex -1, -1, -1, 0, -1, 0, 0, 1, vertices(13)
g_dx.CreateD3DVertex 1, -1, 1, 0, -1, 0, 1, 0, vertices(14)
g_dx.CreateD3DVertex 1, -1, -1, 0, -1, 0, 1, 1, vertices(15)

g_dx.CreateD3DVertex 1, 1, -1, 1, 0, 0, 0, 0, vertices(16)
g_dx.CreateD3DVertex 1, 1, 1, 1, 0, 0, 1, 0, vertices(17)
g_dx.CreateD3DVertex 1, -1, -1, 1, 0, 0, 0, 1, vertices(18)
g_dx.CreateD3DVertex 1, -1, 1, 1, 0, 0, 1, 1, vertices(19)

g_dx.CreateD3DVertex -1, 1, -1, -1, 0, 0, 1, 0, vertices(20)
g_dx.CreateD3DVertex -1, -1, -1, -1, 0, 0, 1, 1, vertices(21)
g_dx.CreateD3DVertex -1, 1, 1, -1, 0, 0, 0, 0, vertices(22)
g_dx.CreateD3DVertex -1, -1, 1, -1, 0, 0, 0, 1, vertices(23)
End Sub

Public Function CreateTextureSurface(sFile As String) As DirectDrawSurface7
Dim ddsTexture As DirectDrawSurface7
Dim i As Long
Dim bIsFound As Boolean

Dim ddsd As DDSURFACEDESC2

'定义纹理平面的属性
ddsd.lFlags = DDSD_CAPS Or DDSD_HEIGHT Or DDSD_WIDTH Or DDSD_PIXELFORMAT _
Or DDSD_TEXTURESTAGE

Dim TextureEnum As Direct3DEnumPixelFormats

'获得当前Direct3DDevice支持的所有纹理类型
Set TextureEnum = Direct3DDevice.GetTextureFormatsEnum()

'便历所有纹理类型,找到符合需要的类型
For i = 1 To TextureEnum.GetCount()
bIsFound = True
Call TextureEnum.GetItem(i, ddsd.ddpfPixelFormat)

With ddsd.ddpfPixelFormat
'跳过不常使用的格式
If .lFlags And (DDPF_LUMINANCE Or DDPF_BUMPLUMINANCE Or DDPF_BUMPDUDV) Then
bIsFound = False
End If

'跳过FourCC格式
If .lFourCC <> 0 Then bIsFound = False

'跳过Alpha模式纹理
If .lFlags And DDPF_ALPHAPIXELS Then bIsFound = False

'只使用16位颜色三维纹理,跳过其它的颜色设定
If .lRGBBitCount <> 16 Then bIsFound = False
End With
If bIsFound Then Exit For
Next i

If Not bIsFound Then
MsgBox "你的图形卡不支持16位颜色绘图平面"
End
End If

ddsd.ddsCaps.lCaps = DDSCAPS_TEXTURE
ddsd.ddsCaps.lCaps2 = DDSCAPS2_TEXTUREMANAGE
ddsd.lTextureStage = 0

sFile = App.Path + "\" + sFile
'建立一个新的纹理绘图平面
Set ddsTexture = g_dd.CreateSurfaceFromFile(sFile, ddsd)

'返回建立的纹理绘图平面
Set CreateTextureSurface = ddsTexture
End Function
doxob 2004-10-29
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一个三维图象在方向键按下时转动的程序。

Option Explicit


Const pi As Single = 3.141592

Const NUM_CUBE_VERTICES As Integer = 4 * 6
Dim g_vCube(NUM_CUBE_VERTICES) As D3DVERTEX

'定义三个材质表面
Dim TextureSurface1 As DirectDrawSurface7
Dim TextureSurface2 As DirectDrawSurface7
Dim TextureSurface3 As DirectDrawSurface7

Dim g_dx As New DirectX7
Dim g_dd As DirectDraw7
Dim g_ddsd As DDSURFACEDESC2
Dim MainBuffer As DirectDrawSurface7
Dim BackBuffer As DirectDrawSurface7
Dim Direct3DDevice As Direct3DDevice7
Dim g_rcDest As RECT, g_rcSrc As RECT
Dim ViewPortRect(0) As D3DRECT
Dim bIsRunning As Boolean
Dim bRoAn As Boolean
Dim CNT As Single
Dim iViewSize As Integer

Private Sub Form_KeyDown(KeyCode As Integer, Shift As Integer)
'根据不同的击键值来决定角度的变化
Select Case KeyCode
Case vbKeyUp
CNT = CNT + 6
bRoAn = True
Case vbKeyDown
CNT = CNT - 6
bRoAn = True
Case vbKeyLeft
CNT = CNT + 6
bRoAn = False
Case vbKeyRight
CNT = CNT - 6
bRoAn = False
Case vbKeySubtract
If iViewSize < 12 Then
iViewSize = iViewSize + 1
End If
Case vbKeyAdd
If iViewSize > 4 Then
iViewSize = iViewSize - 1
End If
End Select
End Sub

Private Sub Form_Load()
Dim j As Long

InitDDraw
InitD3D
InitDeviceObjects

Me.Show

bIsRunning = True
Do While bIsRunning = True
RenderScene
FrameMove (CNT / 360), bRoAn

g_dx.GetWindowRect Me.hWnd, g_rcDest

'将后台绘图平面的内容复制到前台
j = MainBuffer.Blt(g_rcDest, BackBuffer, g_rcSrc, DDBLT_WAIT)
If j <> DD_OK Then
MsgBox "无法将后台绘图平面的内容拷贝到前台,错误代码:" & Hex(j)
End
End If
DoEvents
Loop
End Sub

Private Sub FrameMove(stepVal As Single, bType As Boolean)
Dim matView As D3DMATRIX
Dim matTemp As D3DMATRIX

'建立线形矩阵
g_dx.IdentityMatrix matView

' matView.rc11 = Cos(0.5)
' matView.rc12 = Sin(0.5)
' matView.rc21 = Sin(-0.5)
' matView.rc22 = Cos(0.5)
' matView.rc33 = 1
' matView.rc43 = iviewsize
'你可以尝试将下面5句注释掉而使用上面5句进行视矩阵变换,看有什么效果
matView.rc11 = 1
matView.rc22 = Cos(-0.5)
matView.rc23 = Sin(-0.5)
matView.rc32 = -Sin(-0.5)
matView.rc33 = Cos(-0.5)
matView.rc43 = iViewSize

'对视矩阵进行角度变换
Direct3DDevice.SetTransform D3DTRANSFORMSTATE_VIEW, matView

Dim matWorld As D3DMATRIX

g_dx.IdentityMatrix matWorld
If bType Then
g_dx.RotateXMatrix matWorld, stepVal
Else
g_dx.RotateYMatrix matWorld, stepVal
End If
Direct3DDevice.SetTransform D3DTRANSFORMSTATE_WORLD, matWorld
End Sub

'RenderScene函数执行场景重绘和渲染
Private Sub RenderScene()
Dim i As Integer

'将整个视界背景设置为蓝色,并清除Z缓冲
Direct3DDevice.Clear 1, ViewPortRect(), D3DCLEAR_TARGET, &HFF, 1, 0

'开始绘制场景
Direct3DDevice.BeginScene

'将TextureSurface1设置为Direct3DDevice的纹理平面
Direct3DDevice.SetTexture 0, TextureSurface1
'使用TextureSurface1作为纹理绘制g_vCube(0)到g_vCube(3)顶点之间的平面,
Call Direct3DDevice.DrawPrimitive(D3DPT_TRIANGLESTRIP, D3DFVF_VERTEX, g_vCube(0), _
4, D3DDP_DEFAULT)
'使用TextureSurface1作为纹理绘制g_vCube(4)到g_vCube(7)顶点之间的平面,
Call Direct3DDevice.DrawPrimitive(D3DPT_TRIANGLESTRIP, D3DFVF_VERTEX, g_vCube(4), _
4, D3DDP_DEFAULT)

'将TextureSurface2设置为Direct3DDevice的纹理平面
Direct3DDevice.SetTexture 0, TextureSurface2
'使用TextureSurface2作为纹理绘制g_vCube(8)到g_vCube(11)顶点之间的平面,
Call Direct3DDevice.DrawPrimitive(D3DPT_TRIANGLESTRIP, D3DFVF_VERTEX, g_vCube(8), _
4, D3DDP_DEFAULT)
'使用TextureSurface2作为纹理绘制g_vCube(12)到g_vCube(15)顶点之间的平面,
Call Direct3DDevice.DrawPrimitive(D3DPT_TRIANGLESTRIP, D3DFVF_VERTEX, g_vCube(12), _
4, D3DDP_DEFAULT)

'将TextureSurface3设置为Direct3DDevice的纹理平面
Direct3DDevice.SetTexture 0, TextureSurface3
'使用TextureSurface3作为纹理绘制g_vCube(16)到g_vCube(19)顶点之间的平面,
Call Direct3DDevice.DrawPrimitive(D3DPT_TRIANGLESTRIP, D3DFVF_VERTEX, g_vCube(16), _
4, D3DDP_DEFAULT)
'使用TextureSurface3作为纹理绘制g_vCube(20)到g_vCube(23)顶点之间的平面,
Call Direct3DDevice.DrawPrimitive(D3DPT_TRIANGLESTRIP, D3DFVF_VERTEX, g_vCube(20), _
4, D3DDP_DEFAULT)

'结束绘制场景
Direct3DDevice.EndScene
End Sub

Private Sub Form_Unload(Cancel As Integer)
bIsRunning = False
End Sub

'InitDDraw函数初始化DirectDraw对象,包括建立主绘图平面以及后台绘图平面
Private Sub InitDDraw()
'建立DirectDraw对象
Set g_dd = g_dx.DirectDrawCreate("")
'设定DirectDraw对象的协作模式
g_dd.SetCooperativeLevel Me.hWnd, DDSCL_NORMAL

'预先定义主绘图平面的属性
g_ddsd.lFlags = DDSD_CAPS
g_ddsd.ddsCaps.lCaps = DDSCAPS_PRIMARYSURFACE

'建立主绘图平面
Set MainBuffer = g_dd.CreateSurface(g_ddsd)

g_ddsd.lFlags = DDSD_HEIGHT Or DDSD_WIDTH Or DDSD_CAPS
g_ddsd.ddsCaps.lCaps = DDSCAPS_OFFSCREENPLAIN Or DDSCAPS_3DDEVICE
g_dx.GetWindowRect Me.hWnd, g_rcDest
g_ddsd.lWidth = g_rcDest.Right - g_rcDest.Left
g_ddsd.lHeight = g_rcDest.Bottom - g_rcDest.Top

'建立后台绘图平面
Set BackBuffer = g_dd.CreateSurface(g_ddsd)






lxcc 2004-10-26
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http://www.yesky.com/20020627/1618051.shtml
xinliangyu 2004-10-26
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使用stretchblt 进行缩放,使用PatBlt进行旋转并缩放
helanshan 2004-10-23
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up
flyseagle 2004-10-23
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没有人知道吗,快来人啦,HELP ME!!!
jam021 2004-10-22
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