Mesh creation in irrlicht

**primo** · 30-10-2017, 10:52

trying to mimic example 15 of IrrlichtWrapper for freebasic , look the wrapper here http://www.frankdodd.screaming.net/I...pperPortal.htm
my problem is : can't connect all the pyramid vertices with lines, i am aware that arrays in thinbasic begins with 1, i have changed all the vertices and indices to begin with 1.
to try the example download the wrapper for thinbasic from here http://www.thinbasic.com/community/s...ll=1#post83724 look example irrlicht-tb-largo3a-all.zip and save the code below in it. attached also the freebasic code
note that in freebasic there is:
DIM indices(0 to 17) as ushort
i have tried in TB UInt16, long, dword, word
to let it display only the vertices (as big smooth points) uncomment:
IrrSetNodeMaterialFlag( PyramidNode, %IRR_EMF_POINTCLOUD, 1 )
and comment:
IrrSetNodeMaterialFlag( PyramidNode, %IRR_EMF_WIREFRAME, 1 )

#Include "%app_includepath%\thinbasic_gl.inc"
#Include "%app_includepath%\thinbasic_glu.inc"
#Include "Irrlicht_lw1c.inc" 
Uses "console"
'' global variables
Dim xx,yy,zz As Long
' irrlicht objects
Dim PyramidNode As irr_node 

Dim Pyramid As irr_mesh
Dim OurCamera As irr_camera

' -----------------------------------------------------------------------------
' start the irrlicht interface 
IrrStart( %IRR_EDT_OPENGL, 800, 600, %IRR_BITS_PER_PIXEL_32, %IRR_WINDOWED, _ '200
          %IRR_SHADOWS, %IRR_IGNORE_EVENTS, %IRR_VERTICAL_SYNC_ON )

' send the window caption
IrrSetWindowCaption(  Ucode$("Example 15: Create a custom mesh"))

Dim verts(5) As IRR_VERT
Dim indices(18) As DWord 'UInt16

' -----------------------------------------------------------------------------
' set up five vertices to define the points of a pyramid. the vertices have
' many properties that need to be set up to properly define the structure
verts(1).x = -10 : verts(1).y = 0 : verts(1).z = -10
verts(2).x = -10 : verts(2).y = 0 : verts(2).z = 10
verts(3).x = 10 :  verts(3).y = 0 : verts(3).z = 10
verts(4).x = 10 :  verts(4).y = 0 : verts(4).z = -10
verts(5).x = 0 :   verts(5).y = 20:verts(5).z = 0

' each of the vertices can be assigned a colour to tint the texture, in this
' case we use white
verts(1).vcolor = &H000000FF 
verts(2).vcolor = &H000000FF
verts(3).vcolor = &H00FF0000
verts(4).vcolor = &H00007D00
verts(5).vcolor = &H00007D00

' -----------------------------------------------------------------------------
' create the faces, this is an array of indices referencing the vectors they
' are collected into groups of three each defining a triangle in the mesh
indices(1) = 1 : indices(2) = 2 : indices(3) = 5
indices(4) = 2 : indices(5) = 3 : indices(6) = 5
indices(7) = 3 : indices(8) = 4 : indices(9) = 5
indices(10) = 4 : indices(11) = 1 : indices(12) = 5
indices(13) = 3 : indices(14) = 2 : indices(15) = 1
indices(16) = 1 : indices(17) = 4 : indices(18) = 3

' create the mesh from the array of vertices and indices
Pyramid = IrrCreateMesh( "TestMesh", 5, verts(1), 18, indices(1))
PyramidNode = IrrAddMeshToScene( Pyramid )
' switch off lighting effects on this node
IrrSetNodeMaterialFlag( PyramidNode, %IRR_EMF_LIGHTING, %IRR_OFF )
IrrSetNodeMaterialFlag( PyramidNode, %IRR_EMF_WIREFRAME, 1 )
'IrrSetNodeMaterialFlag( PyramidNode, %IRR_EMF_POINTCLOUD, 1 )
IrrSetNodeMaterialFlag( PyramidNode, %IRR_EMF_BACK_FACE_CULLING, 0 )

IrrSetNodeScale( PyramidNode, 0.5, 0.5, 0.5 )
IrrSetNodePosition( PyramidNode, -8,-3,0)

' add a camera into the scene 
OurCamera = IrrAddCamera( 0,25,-29, 0,0,0 )
'IrrSetNodePosition( OurCamera, 30,20,25)
IrrSetCameraTarget(OurCamera, 0,0,0)
'IrrHideMouse


IrrAddFlyCircleAnimator(PyramidNode,0,8,0,11.5,-0.001)

' -----------------------------------------------------------------------------
' while the irrlicht environment is still running
   
While IrrRunning
    glEnable(%GL_POINT_SMOOTH)
    glPointSize(10)
    glLineWidth(5) 
    yy=yy+1:xx=xx+0:zz=zz+0
    
    'IrrSetNodeRotation( PyramidNode, xx, yy, zz )
    
    ' begin the scene, erasing the canvas with sky-blue before rendering
    IrrBeginScene( 240, 255, 255 )
    ' draw the scene
    IrrDrawScene

    ' end drawing the scene and render it
    IrrEndScene
Wend
' -----------------------------------------------------------------------------
' Stop the irrlicht engine and release resources
IrrStop

the freebasic code:

'' ----------------------------------------------------------------------------
'' Irrlicht Wrapper for Imperative Languages - Freebasic Examples
'' Frank Dodd (2006)
'' ----------------------------------------------------------------------------
'' Example 15 : Custom Mesh
'' This example creates a pyramid mesh that is set up ready to be textured
'' it then adds the mesh as a new node and applies a material to it
'' ----------------------------------------------------------------------------

'' ////////////////////////////////////////////////////////////////////////////
'' Includes for extension libraries
#include "IrrlichtWrapper.bi"

'' ////////////////////////////////////////////////////////////////////////////
'' global variables

' irrlicht objects
DIM Mesh as irr_mesh
DIM MeshTexture as irr_texture
DIM SceneNode as irr_node
DIM OurCamera as irr_camera


'' ////////////////////////////////////////////////////////////////////////////
'' GDB debugger main() function

' -----------------------------------------------------------------------------
' start the irrlicht interface
IrrStart( IRR_EDT_OPENGL, 400, 400, IRR_BITS_PER_PIXEL_32, _
        IRR_WINDOWED, IRR_SHADOWS, IRR_IGNORE_EVENTS, IRR_VERTICAL_SYNC_ON )

' set the window caption
IrrSetWindowCaption( "Example 15: Create a custom mesh" )

' a mesh is created from an array of types called vertices that define a point
' in space. and an array of indices to these vertices that are grouped into
' threes to create triangles that form the mesh
DIM verts(0 to 4) as IRR_VERT
DIM indices(0 to 17) as ushort

' -----------------------------------------------------------------------------
' set up five vertices to define the points of a pyramid. the vertices have
' many properties that need to be set up to properly define the structure
verts(0).x = -10 : verts(0).y = 0 : verts(0).z = -10
verts(1).x = -10 : verts(1).y = 0 : verts(1).z = 10
verts(2).x = 10 : verts(2).y = 0 : verts(2).z = 10
verts(3).x = 10 : verts(3).y = 0 : verts(3).z = -10
verts(4).x = 0 : verts(4).y = 20 : verts(4).z = 0

' the co-ordinates across a texture run from 0 to 1 so we place each of the
' vertices on this texture plane to appear as if the pyramid was painted from
' its bottom up
verts(0).texture_x = 0 : verts(0).texture_y = 0
verts(1).texture_x = 0 : verts(1).texture_y = 1
verts(2).texture_x = 1 : verts(2).texture_y = 1
verts(3).texture_x = 1 : verts(3).texture_y = 0
verts(4).texture_x = 0.5 : verts(4).texture_y = 0.5

' each of the vertices can be assigned a colour to tint the texture, in this
' case we use white
verts(0).vcolor = &h00FFFFFF
verts(1).vcolor = &h00FFFFFF
verts(2).vcolor = &h00FFFFFF
verts(3).vcolor = &h00FFFFFF
verts(4).vcolor = &h00FFFFFF

' -----------------------------------------------------------------------------
' create the faces, this is an array of indices referencing the vectors they
' are collected into groups of three each defining a triangle in the mesh
indices(0) = 0 : indices(1) = 1 : indices(2) = 4
indices(3) = 1 : indices(4) = 2 : indices(5) = 4
indices(6) = 2 : indices(7) = 3 : indices(8) = 4
indices(9) = 3 : indices(10) = 0 : indices(11) = 4
indices(12) = 2 : indices(13) = 1 : indices(14) = 0
indices(15) = 0 : indices(16) = 3 : indices(17) = 2

' create the mesh from the array of vertices and indices
Mesh = IrrCreateMesh( "TestMesh", 5, verts(0), 18, indices(0))

' load texture resource for texturing the nodes
MeshTexture = IrrGetTexture( "./media/texture.jpg" )

' add the mesh to the scene a couple of times
SceneNode = IrrAddMeshToScene( Mesh )

' apply a material to the node
IrrSetNodeMaterialTexture( SceneNode, MeshTexture, 0 )

' switch off lighting effects on this node
IrrSetNodeMaterialFlag( SceneNode, IRR_EMF_LIGHTING, IRR_OFF )

' add a camera into the scene and resposition it to look at the pyramid
OurCamera = IrrAddFPSCamera( IRR_NO_OBJECT, 100.0f, 0.1f )
IrrSetNodePosition( OurCamera, 30,50,25)
IrrSetCameraTarget(OurCamera, 0,0,0)
IrrHideMouse


' -----------------------------------------------------------------------------
' while the irrlicht environment is still running
WHILE IrrRunning
    ' begin the scene, erasing the canvas with sky-blue before rendering
    IrrBeginScene( 64, 96, 96 )

    ' draw the scene
    IrrDrawScene
    
    ' end drawing the scene and render it
    IrrEndScene
WEND

' -----------------------------------------------------------------------------
' Stop the irrlicht engine and release resources
IrrStop