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Line

Line. Attributes (X1, Y1, X2, Y2, Color) The Line Based on Slope Decision on the dx and dy Loop on Greater (Counter of 1) Increment of other (Slope) Plot Pixels in the loop. Line. ‘dx’, ‘dy’ to calculate the diffrence along x and y axis ‘steps’ to calculate Loop counting

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Line

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  1. Line • Attributes (X1, Y1, X2, Y2, Color) • The Line Based on Slope • Decision on the dx and dy • Loop on Greater (Counter of 1) • Increment of other (Slope) • Plot Pixels in the loop

  2. Line • ‘dx’, ‘dy’ to calculate the diffrence along x and y axis • ‘steps’ to calculate Loop counting • ‘xInc’, ‘yInc’ to calculate the Difference covered in each step • ‘x’ , ‘y’ to store current pixel position • ‘i’ as a loop variable

  3. Line • Calculate ‘dx’ as x2-x1,‘dy’ as y2-y1 • ‘steps’ will have the greater absolute value from ‘dx’ or ‘dy’ • ‘xInc’ is ‘dx’/’steps’ ,‘yInc’ is ‘dy’/’steps’ • ‘x’ is ‘x1’ • ‘y’ is ‘y1’ • Plot 1st pixel at ‘x’,’y’ using ‘color’ • Loop ‘k’ 1 to steps and ‘x’+=‘xInc’, ‘y’+=‘yInc’

  4. Rectangle • Attributes (X1,Y1,X2,Y2,Color) • Set of four Lines • Line 1(X1,Y1,X2,Y1) • Line 2(X1,Y2,X2,Y2) • Line 3(X1,Y1,X1,Y2) • Line 4(X2,Y1,X2,Y2)

  5. Button • Set of 8 Lines • Line 1(X1,Y1,X2,Y1, Silver) • Line 2(X1,Y2,X2,Y2, Black) • Line 3(X1,Y1,X1,Y2,Silver) • Line 4(X2,Y1,X2,Y2, Black) • Line 5(X1+1,Y1+1,X2-1,Y1+1, White) • Line 6(X1+1,Y2-1,X2-1,Y2-1,Gray) • Line 7(X1+1,Y1+1,X1+1,Y2-1,White) • Line 8(X2-1,Y1+1,X2-1,Y2-1, Gray)

  6. PolyGon • n no of Attributes • Set of n/2 no of lines • Filled or Open Shape • Parameters Array, and count of points

  7. Circle • Attributes ( xc, yc, radius, color) • ‘x’, ‘y’ as current points • ‘i’ to run loop 0 to 360 • ‘x’ is calculated as xc+radius*cos(rad) • ‘y’ is calculated as yc+radius*sin(rad) • Where rad is PI*deg/180

  8. Arc • Attributes ( xc, yc, radius,startAngle, endAngle , color) • ‘x’, ‘y’ as current points • ‘i’ to run loop start to end • ‘x’ is calculated as xc+radius*cos(rad) • ‘y’ is calculated as yc+radius*sin(rad) • Where rad is PI*deg/180

  9. Ellipse • Attributes ( xc, yc, Xradius,Yradius, color) • ‘x’, ‘y’ as current points • ‘i’ to run loop 0 to 360 • ‘x’ is calculated as xc+Xradius*cos(rad) • ‘y’ is calculated as yc+Yradius*sin(rad) • Where rad is PI*deg/180

  10. Elliptical Arc • Attributes ( xc, yc, Xradius,Yradius,start, end, color) • ‘x’, ‘y’ as current points • ‘i’ to run loop start to end • ‘x’ is calculated as xc+Xradius*cos(rad) • ‘y’ is calculated as yc+Yradius*sin(rad) • Where rad is PI*deg/180

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