Code archives/3D Graphics - Mesh/model viewer

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model viewer by churchaxe
(Posted 23 years ago)
This code is based on the original blitz mediaviewer, which I tuned up a little for my needs. It can be used from inside the IDE by specifying a command-line (Program > Program commandline) or as an .exe by drag/dropping a .x, .3ds or .b3d file on it (or even tru the windows sendto option). Very large/small models it might require some adjustment (specially in fog- and camera-ranges).
Check out the F1...F12 keys and use the leftmousebutton together with left-shift or left-ctrl for naviation. 
;Blitz .x, .3dx, .b3d only modelviewer, based on original blitz mediaviewer

Graphics3D 800, 600, 32, 2
AntiAlias True

Global appdir$ = SystemProperty("APPDIR")
Global camera
Global campiv
Global fullscreen
Global koopiv, koopiv2
Global model
Global plane, plane1
Global scale#
Global showkoo
Global sizeinfo$
Global stopzeit
Global unitsized
Global wire

If CommandLine() = "" Then RuntimeError "...need a file (.x .3ds .b3d) to view!"
Global fil$ = Lower$(CommandLine$())

;get rid of them "
If Left(fil, 1) = Chr(34) Then fil = Mid(fil, 2)
index = Instr(fil, Chr(34))
If index > 0 fil = Left(fil, index - 1)

AppTitle fil

index = Instr(fil$, ".")
If index > 0 ext$ = Mid$(fil$, index + 1)

If ext = "x" Or ext = "3ds" Or ext = "b3d"
	model = LoadMesh(fil$)
Else
	Text 10, 20, "Unknown extension: " + ext
	WaitKey()
	End
EndIf

;no model loaded
If model = 0 RuntimeError "Unable to load 3D mesh:" + fil$

;count Surfaces, Vertices and Triangles
sc = CountSurfaces(model)
Dim texturenames$(sc)

For k = 1 To sc
	vc = vc + CountVertices(GetSurface(model, k))
	tc = tc + CountTriangles(GetSurface(model, k))
	texturenames(k) = TextureName(GetBrushTexture(GetSurfaceBrush(GetSurface(Model, k)), 0))
Next

surf = GetSurface(Model, 1)
brush = GetSurfaceBrush(surf)
tex = GetBrushTexture(brush, 0)

light = CreateLight()
TurnEntity light, 45, 45, 0

campiv = CreatePivot()
camera = CreateCamera()
CameraClsColor camera, 0, 0, 64
CameraFogMode camera, 1
CameraFogColor camera, 0, 0, 64
PositionEntity camera, 0, 0, MeshWidth(model)
PointEntity camera, model
EntityParent camera, campiv
SetCameraParams()

;Axis
	koopiv = CreatePivot()
	temp = CreateCube(koopiv)
	EntityColor temp, 255, 255, 255
	ScaleEntity temp, .05, .05, .05
	
	For i = 1 To 10
		temp2 = CopyEntity(temp, koopiv)
		EntityColor temp2, 255, 0, 0
		PositionEntity temp2, i, 0, 0
	Next
	
	For i = 1 To 10
		temp2 = CopyEntity(temp, koopiv)
		EntityColor temp2, 0, 255, 0
		PositionEntity temp2, 0, i, 0
	Next
	
	For i = 1 To 10
		temp2 = CopyEntity(temp, koopiv)
		EntityColor temp2, 0, 0, 255
		PositionEntity temp2, 0, 0, i
	Next
	ScaleEntity koopiv, 1, 1, 1
	
	koopiv2 = CreatePivot()
	xaxis = CreateCube(koopiv2)
	ScaleEntity xaxis, 5, .01, .01
	EntityColor xaxis, 255, 0, 0
	PositionEntity xaxis, 5, 0, 0
	
	yaxis = CreateCube(koopiv2)
	ScaleEntity yaxis, .01, 5, .01
	EntityColor yaxis, 0, 255, 0
	PositionEntity yaxis, 0, 5, 0
	
	zaxis = CreateCube(koopiv2)
	ScaleEntity zaxis, .01, .01, 5
	EntityColor zaxis, 0, 0, 255
	PositionEntity zaxis, 0, 0, 5

loadsettings()

While Not KeyHit(1)
	RenderWorld()
	
	If unitsized
		Color 255, 128, 0
	Else
		Color 255, 255, 255
	EndIf
	
	Text GraphicsWidth() * .4, 0, sizeinfo
	If plane <> 0 Then Text GraphicsWidth() * .75, 0, "checker scale: " + scale + " units"
	Text 0, 0, "surfaces:  " + sc
	Text 0, 14, "vertices:  " + vc
	Text 0, 28, "triangles: " + tc
	Text 0, 56, "x-size: " + MeshWidth(model)
	Text 0, 70, "y-size: " + MeshHeight(model)
	Text 0, 84, "z-size: " + MeshDepth(model)

	If viewtextures
		If sc > 1
			For k = 1 To sc
				surf = GetSurface(Model, k)
				brush = GetSurfaceBrush(surf)
				tex = GetBrushTexture(brush, 0)
				Text 0, GraphicsHeight() * .97 - (sc - k) * 14, "texture" + k + " " + TextureName(tex)
			Next
		Else
			Text 0, GraphicsHeight() * .97, "texture " + TextureName(tex)
		EndIf
	EndIf
	
	Flip

	If MouseDown(1) = True
		mxspd# = MouseXSpeed()
		myspd# = MouseYSpeed()

		If KeyDown(29) = False And KeyDown(42) = False	;rotate cam
			If MouseHit(1)	;compensate initial rotation of view
				TurnEntity campiv, 0, mxspd * .4, 0, 1
				TurnEntity campiv, myspd * .4, 0, 0, 0
			EndIf
		
			TurnEntity campiv, 0, -mxspd * .4, 0, 1
			TurnEntity campiv, -myspd * .4, 0, 0, 0
		ElseIf KeyDown(29) = True	;strg: pan cam
			If MouseHit(1)
				MoveEntity camera, mxspd * .002 * MeshWidth(model), -myspd * .002 * MeshWidth(model), 0
			EndIf
			
			MoveEntity camera, -mxspd * .002 * MeshWidth(model), myspd * .002 * MeshWidth(model), 0
		ElseIf KeyDown(42) = True	;shift: zoom cam
			If MouseHit(1)
				MoveEntity camera, 0, 0, myspd * .002 * MeshWidth(model)
			EndIf
			MoveEntity camera, 0, 0, -myspd * .002 * MeshWidth(model)
		EndIf
	EndIf

	;MouseWheel
	If mz > MouseZ()
		If KeyDown(29)
			MoveEntity camera, 0, 0, .01 * MeshWidth(model)
		ElseIf KeyDown(42)
			MoveEntity camera, 0, 0, 1 * MeshWidth(model)
		Else
			MoveEntity camera, 0, 0, .1 * MeshWidth(model)
		EndIf
	ElseIf mz < MouseZ()
		If KeyDown(29)
			MoveEntity camera, 0, 0, -.01 * MeshWidth(model)
		ElseIf KeyDown(42)
			MoveEntity camera, 0, 0, -1 * MeshWidth(model)
		Else
			MoveEntity camera, 0, 0, -.1 * MeshWidth(model)
		EndIf
	EndIf
	mz = MouseZ()
	
	If KeyHit(59)	;F1
		ToggleWireframe()
	ElseIf KeyHit(60)	;F2-toggle axis
		If showkoo
			HideEntity koopiv
			HideEntity koopiv2
			showkoo = False
		Else
			ShowEntity koopiv
			ShowEntity koopiv2
			showkoo = True
		EndIf
	ElseIf KeyHit(61)	;F3-toggle xz-plane
		If plane = 0
			TogglePlane(True)
		Else
			TogglePlane(False)
		EndIf
	ElseIf KeyHit(62)	;F4-toggle size
		If unitsized = False
			FitMesh model, -.5, -.5, -.5, 1, 1, 1, True
			sizeinfo = "scaled to 1 unit, centered"
			scale = 1
			CameraRange camera, .1, 30
			CameraFogRange camera, 15, 30
			unitsized = True
		Else
			FreeEntity model
			model = LoadMesh(fil$)
			sizeinfo = "actual size and position"
			unitsized = False
		EndIf
		SetCameraParams()
		If plane <> 0
			TogglePlane(True)
		EndIf
	ElseIf KeyHit(63)	;F5-reset view to starting-values
		FreeEntity model
		model = LoadMesh(fil$)
		wire = True
		togglewireframe()
		loadsettings()
	ElseIf KeyHit(64)	;F6-reset view straight
		RotateEntity campiv, 0, 0, 0
		PositionEntity camera, 0, 0, MeshWidth(model)
		SetCameraParams()
	ElseIf KeyHit(65)	;F7- reset view perspectively
		RotateEntity campiv, -20, -30, 0
		PositionEntity camera, 0, 0, MeshWidth(model)
		SetCameraParams()
	ElseIf KeyHit(66)	;F8-view textures
		viewtextures = Not viewtextures
	ElseIf KeyHit(67)	;F9-browse dir with ACDSEE32
		If FileType("c:\programme\acdsee32\acdsee32.exe") = 1
			ExecFile "c:\programme\acdsee32\acdsee32.exe"
			mz = MouseZ()
		EndIf
	ElseIf KeyHit(68)	;F10-view textures with ACDSEE32
		tmp$ = ""
		For k = 1 To sc
			tmp$ = tmp$ + " " + texturenames(k)
		Next
		If FileType("c:\programme\acdsee32\acdsee32.exe") = 1
			ExecFile "c:\programme\acdsee32\acdsee32.exe " + tmp$
			mz = MouseZ()
		EndIf
	ElseIf KeyHit(87)	;F11-edit with Notepad
		ExecFile "notepad " + fil
		mz = MouseZ()
	ElseIf KeyHit(88)	;F12-switch to fullscreen
		If fullscreen
			EndGraphics()
			Graphics3D 800, 600, 32, 2
			fullscreen = False
		Else
			EndGraphics()
			Graphics3D 1280, 1024, 32, 1
			fullscreen = True
		EndIf
	
		plane = 0
		plane1 = 0
		model = LoadMesh(fil$)
		;no model loaded
		If model = 0 RuntimeError "Unable to load 3D mesh:" + fil$
		
		;count Surfaces, Vertices and Triangles
		sc = CountSurfaces(model)
		Dim texturenames$(sc)
		
		For k = 1 To sc
			vc = vc + CountVertices(GetSurface(model, k))
			tc = tc + CountTriangles(GetSurface(model, k))
			texturenames(k) = TextureName(GetBrushTexture(GetSurfaceBrush(GetSurface(Model, k)), 0))
		Next
		
		surf = GetSurface(Model, 1)
		brush = GetSurfaceBrush(surf)
		tex = GetBrushTexture(brush, 0)
		
		light = CreateLight()
		TurnEntity light, 45, 45, 0
		
		campiv = CreatePivot()
		camera = CreateCamera()
		CameraClsColor camera, 0, 0, 64
		CameraFogMode camera, 1
		CameraFogColor camera, 0, 0, 64
		PositionEntity camera, 0, 0, MeshWidth(model)
		PointEntity camera, model
		EntityParent camera, campiv
		SetCameraParams()

		;axis
		koopiv = CreatePivot()
		temp = CreateCube(koopiv)
		EntityColor temp, 255, 255, 255
		ScaleEntity temp, .05, .05, .05
		
		For i = 1 To 10
			temp2 = CopyEntity(temp, koopiv)
			EntityColor temp2, 255, 0, 0
			PositionEntity temp2, i, 0, 0
		Next
		
		For i = 1 To 10
			temp2 = CopyEntity(temp, koopiv)
			EntityColor temp2, 0, 255, 0
			PositionEntity temp2, 0, i, 0
		Next
		
		For i = 1 To 10
			temp2 = CopyEntity(temp, koopiv)
			EntityColor temp2, 0, 0, 255
			PositionEntity temp2, 0, 0, i
		Next
		ScaleEntity koopiv, 1, 1, 1
		
		koopiv2 = CreatePivot()
		xaxis = CreateCube(koopiv2)
		ScaleEntity xaxis, 5, .01, .01
		EntityColor xaxis, 255, 0, 0
		PositionEntity xaxis, 5, 0, 0
		yaxis = CreateCube(koopiv2)
		ScaleEntity yaxis, .01, 5, .01
		EntityColor yaxis, 0, 255, 0
		PositionEntity yaxis, 0, 5, 0
		zaxis = CreateCube(koopiv2)
		ScaleEntity zaxis, .01, .01, 5
		EntityColor zaxis, 0, 0, 255
		PositionEntity zaxis, 0, 0, 5
		
		loadsettings()			
	EndIf
Wend
savesettings()
End

Function create_checker_tex(r1, g1, b1, r2, g2, b2, texscale#, texsize = 128)
	texture_handle = CreateTexture(texsize, texsize)
	SetBuffer TextureBuffer(texture_handle)
	Color r1, g1, b1
	Rect 0, 0, texsize, texsize
	Color r2, g2, b2
	Rect 0, 0, texsize/2, texsize/2, 1
	Rect texsize/2, texsize/2, texsize/2, texsize/2, 1
	ScaleTexture texture_handle, texscale*2, texscale*2
	SetBuffer BackBuffer()
	Return texture_handle
End Function

Function savesettings()
	file = WriteFile(appdir + "mediaview.ini")
		WriteLine(file, "axis=" + showkoo)
		If plane <> 0
			WriteLine(file, "plane=" + 1)
		Else
			WriteLine(file, "plane=" + 0)
		EndIf
		WriteLine(file, "unitsized=" + unitsized)
		WriteLine(file, "campitch=" + EntityPitch(campiv))
		WriteLine(file, "camyaw=" + EntityYaw(campiv))
	CloseFile(file)
End Function

Function loadsettings()
	If FileType(appdir + "mediaview.ini") = 0 
		file = WriteFile(appdir + "mediaview.ini")	;generate new file with initial settings
			WriteLine(file, "axis=" + 1)
			WriteLine(file, "plane=" + 0)
			WriteLine(file, "unitsized=" + 0)
			WriteLine(file, "campitch=" + EntityPitch(campiv))
			WriteLine(file, "camyaw=" + EntityYaw(campiv))
		CloseFile(file)
	EndIf

	file = ReadFile(appdir + "mediaview.ini")
		While Not Eof(file)
			zeile$ = ReadLine(file)
			separator = Instr(zeile, "=")
			Wert$ = Mid(zeile, separator + 1, -1)
	
			Select Trim(Mid(zeile, 1, separator - 1))
			Case "axis"
				showkoo = wert
				If showkoo = False
					HideEntity koopiv
					HideEntity koopiv2
				Else
					ShowEntity koopiv
					ShowEntity koopiv2
				EndIf
			Case "plane"
				If wert = 1 Then TogglePlane(True)
			Case "unitsized"
				unitsized = wert
				If unitsized = 1
					FitMesh model, -.5, -.5, -.5, 1, 1, 1, True
					sizeinfo = "scaled to 1 unit, centered"
				Else
					sizeinfo = "actual size and position"
				EndIf
				PositionEntity camera, 0, 0, MeshWidth(model)
				SetCameraParams()
			Case "campitch"
				pitch# = wert
			Case "camyaw"
				yaw# = wert
				RotateEntity campiv, pitch, yaw, 0
			End Select
		Wend
	CloseFile(file)
End Function

Function TogglePlane(anzeigen)
	If anzeigen = True
		FreeTexture planetex
		FreeEntity plane
		FreeEntity plane1
	
		planetex = create_checker_tex(0, 0, 64, 255, 255, 255, scale)
						
		;upper plane
		plane = CreatePlane()
		EntityAlpha plane, .3
		EntityTexture plane, planetex
		
		;lower plane
		plane1 = CreatePlane()
		RotateEntity plane1, 0, 0, 180
		EntityAlpha plane1, .3
		EntityTexture plane1, planetex
		If wire	
			HideEntity plane
			HideEntity plane1
		EndIf
	Else
		FreeTexture planetex
		FreeEntity plane
		FreeEntity plane1
		plane = 0
		plane1 = 0
	EndIf
End Function

Function ToggleWireframe()
	If wire
		wire = False
		If plane <> 0
			ShowEntity plane
			ShowEntity plane1
		EndIf
	Else
		If plane <> 0
			HideEntity plane
			HideEntity plane1
		EndIf
		wire = True
	EndIf
	WireFrame wire
End Function

Function SetCameraParams()
	If MeshWidth(model) < .1
		scale# = .01 
	ElseIf MeshWidth(model) < 1
		scale# = .1 
	ElseIf MeshWidth(model) < 10
		scale = 1
	Else
		scale = 10
	EndIf

	CameraRange camera, .1 * scale, 100 * scale
	CameraFogRange camera, 2 * EntityDistance(camera, model), 4 * EntityDistance(camera, model)

	If plane <> 0
		TogglePlane(True)
	EndIf
	
End Function

Comments

CP510
(Posted 21 years ago)
Thanks alot, I was looking for something like this.

Good stuff! Works perfectly, I'll set it as my default program for opening b3d files.

Mustang
(Posted 21 years ago)
Yup, nice! Thanks!

puki
(Posted 21 years ago)
I never got the orginal one to work - this one better had.

Dustin
(Posted 21 years ago)
Great tool!

Although on mine, I did reverse the mouse wheel & killed the fog.

Thanks!!

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