TRIANGLE X1, Y1, X2, Y2, X3, Y3 [, C [, FILL]]
Draws a triangle on the attached video output or LCD display panel with the corners at X1, Y1 and X2, Y2 and X3, Y3.
C is the colour of the triangle and defaults to the current foreground colour.
FILL is the fill colour and defaults to no fill (it can also be set to -1 for no fill).
All parameters can be expressed as arrays and the software will plot the number of triangles as determined by the dimensions of the smallest array unless X1 = Y1 = X2 = Y2 = X3 = Y3 = -1 in which case processing will stop at that point.
x1, y1, x2, y2, x3,and y3 must all be arrays or all be single variables/constants otherwise an error will be generated c and fill can be either arrays or single variables/constants.
TRIANGLE SAVE [#]n, x1,y1,x2,y2,x3,y3
Saves a triangular area of the screen to buffer #n.
TRIANGLE RESTORE [#]n
Restores a saved triangular region of the screen and deletes the saved buffer.