As it happens I've just been doing a lot of trig plotting in LC recently. The basic answer to this problem is that the sides of the square need to be 115% the sides of your triangle, with the base of your triangle horizontal and parallel to the base of your square and the pinnacle of your triangle touching the top of your square at a point which bisects the top line of the square in half. It is the only point of the triangle which touches the square. The loc of your square will logically be half that, therefore 57.5% of the length of the side of the triangle.
So assuming you want a equilateral triangle with sides 200. Pick your pinnacle. Draw a line to the right 60° below the horizon for 200. Draw a line the left from the pinnacle, 60° below the horizon for 200. Join both these points which should result in a 200 line parallel to the horizon. Now from the pinnacle draw a line along the horizon which is 200 * 1.15 = 230, 115 to the left of the pinnacle, 115 to the right. From each end points drop down 230. Then join these end points which again should be a 230 line parallel to the horizon and your triangle base. To draw the triangle inside a square in LC is relatively easy. The only number you need to remember is 0.87 (which is Cos 30° in degrees not radians; in LC use cos(30 * pi /180) to convert radian into degrees), the rest you can calculate from the length of you triangle side. Assuming 200; 0.87 x 200 = 173 = the height of your triangle 1.15 x 200 = 230 = the sides of your square (which just happens to be 200 / Cos 30) 0.5 x 200 = 100 = half the triangle side 0.5 x 230 = 115 = half the side of the square First draw your square, in this case a 230 x 230 pixel square. Assuming the top left is at 1,1, the midpoint along the top is at 116,1 Now draw a line (right side of triangle) from 116,1 to a point 100 further right and 173 below, so 216,174 Draw the left side of the triangle from 116,1 to a point 100 to the left and 173 below, so 16,174 Join these two points as your triangle base. (Note 16 to 216 = 200, therefore your triangle base is correct) The loc of your square. 116,116 is also the centre of your triangle. HTH _______________________________________________ use-livecode mailing list use-livecode@lists.runrev.com Please visit this url to subscribe, unsubscribe and manage your subscription preferences: http://lists.runrev.com/mailman/listinfo/use-livecode
