Error C3861: 'DrawTrapezium': identifier not found

[brendanb581]

I had the function 'DrawTrapezium' in which I declared all of the variables, but after moving them into parameters I get this error. Here is the code: (the 2 sections i'm on about are in bold)

void DrawImage( )
{
POLYGON polyTempP, polyTempQ, polyTempQT; // Temporary polygons for copying transformed, projected / clipped
// versions of scene polys before drawing them.
int iCurrentPoly; // Current polygon in process

if ( m_iNumOfPolys <= 0 )
//DrawSquare(Default_Colour ); // This draws the square you see, replace with Trapezium, and later Polygon
DrawTrapezium(Default_Colour, 50 + m_iMoveX, m_iMoveX, 0.5, -0.5, 200, 120 + m_iMoveY, m_iMoveY);
else
m_iOurFrameCount++; // Increment frame counter if we have a polygon to draw

for ( iCurrentPoly = 0; iCurrentPoly < m_iNumOfPolys; iCurrentPoly++ ) // for each polygon
{
if ( iFaceSelection > m_iNumOfPolys )
iFaceSelection = m_iNumOfPolys; //Keep debug selector in range


if ( iFaceSelection && ( iCurrentPoly + 1 ) != iFaceSelection)
continue; // Reject unselected polygons if debug selection active.


polyTempP = polylist[iCurrentPoly]; //copy static data into temp poly structure

// Copy each vertex in polygon, add displacement to allow shift
for (int i = 0; i < polylist[iCurrentPoly].nv; i++)
{
polyTempP.vert[i].x = polylist[iCurrentPoly].vert[i].x + m_iMoveX;
polyTempP.vert[i].y = polylist[iCurrentPoly].vert[i].y + m_iMoveY;
}

if ( bDebug )
fprintf( debugfile, " number of vertices: %d\n", polyTempP.nv); // print number of vertices

fflush( debugfile );

if ( bDebug ) // Print out current poly specs if debug active
{
for (int i = 0; i < polyTempP.nv; i++)
{
fprintf( debugfile, "before clipping Polygon %d, Vertex %d values: %7.2f, %7.2f, %11.6f\n",
iCurrentPoly, i, polyTempP.vert[i].x, polyTempP.vert[i].y, polyTempP.vert[i].z );
}
fflush( debugfile );

}
// The section below calls clipping and polygon draw routines, commented out to allow the
// program to work without them. You may re-instate once you have appropriate routines,
// or replace with your own code.
/*
ClipPolyXHigh( &polyTempP, &polyTempQT, WINDOWWIDTH ); // Clip against upper x boundary
ClipPolyYHigh( &polyTempQT, &polyTempQ, WINDOWHEIGHT ); // Clip against upper y boundary (bottom of screen)
ClipPolyXLow( &polyTempQ, &polyTempQT, 0); // Clip against lower x boundary
ClipPolyYLow( &polyTempQT, &polyTempQ, 0); // Clip against lower y boundary (bottom of screen)

if ( bDebug ) // Print out current poly specs if debug active
{
for ( int i = 0; i < polyTempQ.nv; i++ )
fprintf( debugfile, "after clipping Polygon %d Vertex %d values:y %7.2f %7.2f %11.6f\n",
iCurrentPoly, i, polyTempQ.vert[i].x, polyTempQ.vert[i].y, polyTempQ.vert[i].z );

fflush(debugfile);
}

DrawPolygon( &polyTempQ ); // Call the drawing routine
*/
}
if ( m_iNumOfPolys > 0 )
bDebug = false; // Switch debug off after first run - switch on again via keyboard control if needed


}

//-----------------------------------------------------------------------------
// Name: DrawSquare
// Desc: Draw a sqaure
//-----------------------------------------------------------------------------
//void DrawSquare(COLOUR c )
void DrawTrapezium( COLOUR c , float x_end, float x_start, float slope_right, float slope_left, int m_iMoveX, float y_end, float y_start)
{
//x_end = 50+m_iMoveX;
//float x_end = 50 + m_iMoveX; //right slope
//float x_start = m_iMoveX; //left slope
//float slope_right =0.5;
//float slope_left =-0.5;
//int m_iMoveX = 200; //task 9
//
//float y_end = 120+ m_iMoveY;
//float y_start = m_iMoveY;

//Note no protection to keep in screen bounds...
for ( int j = y_start; j < y_end; j++)
//for ( int i = m_iMoveX; i < 50 + m_iMoveX; i++)
{
x_end = x_end + slope_right; //this line is so the float 'slope_right' can easily be changed to make the slope different
x_start = x_start + slope_left;
for ( int i =x_start; i < x_end; i++)
//for( int j = m_iMoveY; j < 50 + m_iMoveY; j++)
{

Plotpix( i, j, c.r, c.g, c.b );
}
}
}

[brendanb581]

My bad forgot to pastebin:

http://pastebin.com/nYmsrAL9

[coder777]

You have to write the prototype before you can use the function (before DrawImage( )), like so:

void DrawTrapezium( COLOUR c , float x_end, float x_start, float slope_right, float slope_left, int m_iMoveX, float y_end, float y_start);

Please use code tags: [code]Your code[/code]

[brendanb581]

Thanks :) And I will remember for next time cheers.