#define FBEXT_NO_LIBJPG
#define fbext_NoBuiltinInstanciations() 1

#include once "fbgfx.bi"
'#include once "ext/graphics/png.bi"
#include once "ext/graphics/sprite.bi"
#include once "ext/graphics/manip.bi"
#include once "ext/math/vectors.bi"
#include once "ext/math/matrix.bi"
#include once "GL/gl.bi"
#include once "GL/glu.bi"

using ext.math
using ext.gfx

type triangle_struct

    as integer point_id(2)
    as uinteger tex_id

end type

type model_struct

    as uinteger max_vertices
    as vector3d ptr vertex

    as uinteger max_triangles
    as triangle_struct ptr triangle

end type

declare function load_texture( byref filename as string, texture as gluint, byref force_clamp as integer ) as integer
declare function outline( byref filename as string, byval skcol as uinteger ) as integer
declare function outline_2verts( byref filename as string, byval skcol as uinteger, byref verts as vector2d ptr ) as uinteger
declare function make_ccw( byref vrets as vector2d ptr, byref max_verts as uinteger ) as uinteger



dim as integer scr_w = 640, scr_h = 480

screenres scr_w, scr_h, 32



dim as vector2d ptr tverts
dim as uinteger max_tverts = outline_2verts( "res/img/madscience.png", &hffff00ff, tverts )
print "finish outline!"



make_ccw( tverts, max_tverts)

print "finish make_ccw!"

sleep



screenres scr_w, scr_h, 32, 0, FB.GFX_OPENGL

screencontrol FB.SET_GL_DEPTH_BITS, 24

glViewport(0, 0, scr_w, scr_h)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
gluPerspective( 60, scr_w/scr_h, .01, 10000 )

glDepthFunc( GL_LEQUAL )
glEnable( GL_COLOR_MATERIAL )
glHint( GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST )
glPolygonMode ( GL_FRONT, GL_FILL )
glPolygonMode ( GL_BACK, GL_LINE )
glEnable( GL_LIGHTING )
glEnable( GL_LIGHT0 )
glEnable( GL_CULL_FACE )


dim as vector3d campos=vector3d(0,0,3), camlook=vector3d(0,0,0)




dim as gluint texture
load_texture( "res/img/madscience.png", texture, 0 )










do



    if multikey( FB.SC_LEFT ) then
        campos.x-=1.1
    end if

    if multikey( FB.SC_RIGHT ) then
        campos.x+=1.1
    end if

    if multikey( FB.SC_UP ) then
        campos.z+=1.1
    end if

    if multikey( FB.SC_DOWN ) then
        campos.z-=1.1
    end if


    glClear( GL_DEPTH_BUFFER_BIT or GL_COLOR_BUFFER_BIT )
    glMatrixMode( GL_MODELVIEW )
    glLoadIdentity()
    gluLookat( campos.x, campos.y, campos.z, camlook.x, camlook.y, camlook.z, 0,1,0 )


    glColor3f(1,1,1)


    glrotatef(timer*50,7,2,3)

    'glBegin(GL_QUADS)
    'glNormal3f(0f,0f,1f)

    'gltexcoord2f(0f,1f)
    'glVertex3f(-.5,.5,0f)

    'gltexcoord2f(0f,0f)
    'glVertex3f(-.5,-.5,0f)

    'gltexcoord2f(1f,0f)
    'glVertex3f(.5,-.5,0f)

    'gltexcoord2f(1f,1f)
    'glVertex3f(.5,.5,0f)

    'glEnd


    if max_tverts>0 then

        glDisable( GL_CULL_FACE )
        glDisable( GL_LIGHTING )
        glDisable( GL_TEXTURE_2D )
        glColor3f(1,1,1)

        glBegin( GL_POLYGON )
        for i as integer = 0 to max_tverts-1
            glvertex3f( tverts[i].x, tverts[i].y, 0 )
        next
        glEnd()


        glEnable( GL_TEXTURE_2D )

    end if


    flip

    print #1, campos


loop until multikey(FB.SC_ESCAPE)






deallocate( tverts )
close #1


function make_ccw( byref verts as vector2d ptr, byref max_verts as uinteger ) as uinteger

    dim as double angle(max_verts-1)


    dim as vector2d center

    for i as integer = 0 to max_verts-1
        center+=verts[i]
    next

    center/=max_verts


    for i as integer = 0 to max_verts-1

        angle(i) = atan2(center.y-verts[i].y, center.x-verts[i].x)'center.AngleBetween(verts[i])

    next


    for i as integer = 0 to max_verts-1

        for i2 as integer = 0 to max_verts-1

            if i2<>i then

                if angle(i2)<angle(i) then
                    swap verts[i], verts[i2]
                    swap angle(i), angle(i2)
                end if

            end if

        next

    next


    for i as integer = 0 to max_verts-1
        pset( (verts[i].x*342)+(342/2), (verts[i].y*320)+(320/2) )
    next


    return 0

end function




function outline( byref filename as string, byval skcol as uinteger = &hffff00ff ) as integer

    'draws only the outline of a fb.image ptr

    dim as ext.gfx.image ptr temp = ext.gfx.loadimage( filename )
    dim mySprite as Sprite
    mySprite.Init( 1 )
    mySprite.SetImage(0, *temp)
    var bw = mysprite.getcolmap(0)

    put(0,0),temp,alpha,16

    for y1 as integer = 0 To temp->height - 2
        For x1 as integer = 0 To temp->width - 2

            dim as uinteger dif
            dim as uinteger col1 = point(x1,y1,bw)
            dim as ubyte r1 = (col1 shr 24) and 255
            dim as ubyte g1 = (col1 shr 16) and 255
            dim as ubyte b1 = (col1 shr 8) and 255

            for y2 as integer = 0 To 1
                for x2 as integer = 0 To 1

                    dim as uinteger col2 = point(x1+x2,y1+y2, bw)

                    if dif <> skcol then
                        dif+=abs(r1-((col2 shr 24) and 255)) + abs(g1-((col2 shr 16) and 255)) + abs(b1-((col2 shr 8 ) and 255))
                    end if

                next
            next

            if dif > 0 then
                pset (x1,y1), rgba( dif, dif, dif, dif )
            end if

        next
    next

    'imagedestroy( temp )

    return 0

end function


function outline_2verts( byref filename as string, byval skcol as uinteger, byref verts as vector2d ptr ) as uinteger

    'draws only the outline of a fb.image ptr



    dim as uinteger vcnt

    dim as ext.gfx.image ptr temp = ext.gfx.loadimage( filename )

    dim mySprite as Sprite
    mySprite.Init( 1 )
    mySprite.SetImage(0, *temp)

    var bw = mysprite.getcolmap(0)

    put(0,0),temp,alpha,16

    for y1 as integer = 0 To temp->height - 2
        For x1 as integer = 0 To temp->width - 2

            dim as uinteger dif
            dim as uinteger col1 = point(x1,y1,bw)
            dim as ubyte r1 = (col1 shr 24) and 255
            dim as ubyte g1 = (col1 shr 16) and 255
            dim as ubyte b1 = (col1 shr 8) and 255

            for y2 as integer = 0 To 1
                for x2 as integer = 0 To 1

                    dim as uinteger col2 = point(x1+x2,y1+y2, bw)

                    if dif <> skcol then
                        dif+=abs(r1-((col2 shr 24) and 255)) + abs(g1-((col2 shr 16) and 255)) + abs(b1-((col2 shr 8 ) and 255))
                    end if

                next
            next

            if dif > 0 then
                pset (x1,y1), rgba( dif, dif, dif, dif )

                verts = reallocate( verts, (vcnt+1)*sizeof(vector2d) )
                verts[vcnt] = vector2d(x1-(temp->width/2) ,y1-(temp->height/2) )
                verts[vcnt]/=vector2d(temp->width, temp->height)


                'pset( (verts[vcnt].x)+(temp->width/2), (verts[vcnt].y)+(temp->height/2)), rgba(dif, dif, dif, dif)

                'print #1, verts[vcnt]

                vcnt+=1
            end if

        next
    next

    'imagedestroy( temp )


    print #1, vcnt

    return vcnt

end function



function load_texture( byref filename as string, texture as gluint, byref force_clamp as integer ) as integer

    glenable( GL_TEXTURE_2D )
    glbindtexture( GL_TEXTURE_2D, texture )

    dim SprWidth as integer
    dim SprHeight as integer

    dim as ext.gfx.image ptr temp = ext.gfx.loadimage( filename, ext.gfx.TARGET_OPENGL )
    sprWidth = temp->width
    sprHeight = temp->height

    glteximage2d( GL_TEXTURE_2D, 0, GL_RGBA, SprWidth, SprHeight, 0, GL_RGBA, GL_UNSIGNED_BYTE, temp )

    glubuild2dmipmaps( GL_TEXTURE_2D, GL_RGBA, SprWidth, SprHeight, GL_RGBA, GL_UNSIGNED_BYTE, temp )

    if force_clamp then
        gltexparameterf GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE
        gltexparameterf GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE
    else
        gltexparameterf GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT
        gltexparameterf GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT
    end if

    gltexparameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR )
    gltexparameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR )
    gltexenvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE)

    return 0

end function