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1. 1. QCAD Open Computer Assisted Design
2. 2. Tema 2. El dibujo aplicado a la Tecnología <ul><ul><li>What are we going to learn? </li></ul></ul><ul><ul><li>2.1 Basic Graphic Knoledge </li></ul></ul><ul><ul><li>2.2 Relative, Absolute and Polar coordinates </li></ul></ul><ul><ul><li>2.3 Lines, Squares, Circules </li></ul></ul><ul><ul><li>2.4 Views of an object </li></ul></ul><ul><ul><li>2.5 Marking </li></ul></ul><ul><ul><li>2.6 Perspective </li></ul></ul>
3. 3. 2.1 Basic Graphic Knoledge <ul><li>In 2D we define a point with two Absolute coordinates: </li></ul><ul><li>(X,Y) </li></ul><ul><li>P1: (X=5, Y=7) </li></ul>X Y (5,7) -X -Y Grid reference
4. 4. 2.1 Basic Graphic Knoledge <ul><li>Exercise: Using your notebook cuadricula mark this points: </li></ul><ul><li>0,10 </li></ul><ul><li>10,10 </li></ul><ul><li>10,30 </li></ul><ul><li>20,50 </li></ul><ul><li>30,30 </li></ul><ul><li>30, 10 </li></ul><ul><li>(40,10) </li></ul><ul><li>(40,0) </li></ul><ul><li>(X,Y) </li></ul>Grid reference
5. 5. 2.1 Basic Graphic Knoledge <ul><li>Exercise: Using your notebook grid mark this points: </li></ul><ul><li>0,10 </li></ul><ul><li>10,10 </li></ul><ul><li>10,30 </li></ul><ul><li>20,50 </li></ul><ul><li>30,30 </li></ul><ul><li>30, 10 </li></ul><ul><li>(40,10) </li></ul><ul><li>(40,0) </li></ul><ul><li>(X,Y) </li></ul>
6. 6. 2.1 Basic Graphic Knoledge <ul><li>Exercise: Draw a line from P 1 to P 2 . </li></ul><ul><li>P 1 =(5,7) ; P 2 =(-4,2) </li></ul><ul><li>P 1 =(-2,1) ; P 2 =(3,4) </li></ul>Grid reference
7. 7. 2.1 Basic Graphic Knoledge <ul><li>Exercise: Draw a line from P 1 to P 2 . </li></ul><ul><li>P 1 =(5,7) </li></ul><ul><li>P 2 =(-4,2) </li></ul>P 1 =(5,7) P 2 =(-4,2) Grid reference
8. 8. 2.1 Basic Graphic Knoledge <ul><li>P 1 =(5,7) ; P 2 =(-4,2) </li></ul>
9. 9. 2.1 Basic Graphic Knoledge <ul><li>Polar coordinates </li></ul><ul><li>These use the distance between points and the angle formed with the horizontal. </li></ul>
10. 10. 2.1 Basic Graphic Knoledge <ul><li>Exercise: Draw a line from P 1 to P 2 . </li></ul><ul><li>P 1 =(5,7) ; P 2 =(10, 180º) </li></ul><ul><li>P 1 =(-4,2) ; P 2 =(5, 45º) </li></ul>Grid reference
11. 11. 2.1 Basic Graphic Knoledge <ul><li>Exercise: Draw a line from P 1 to P 2 . </li></ul><ul><li>P 1 =(5,7) ; P 2 =(10, 180º) </li></ul><ul><li>P 3 =(-4,2) ; P 4 =(5, 45º) </li></ul>Grid reference P 1 =(5,7) P 2 =(10, 180º) P 3 =(-4,2) P 4 =(5, 45º)
12. 12. 2.1 Basic Graphic Knoledge <ul><li>Relative coordinates mark the last point used as the new grid reference from where we mark the next. </li></ul>P 1 =(5,7) P 2 =(@-9,-5) Grid reference
13. 13. 2.1 Basic Graphic Knoledge <ul><li>Exercise: Using your notebook grid mark this points: </li></ul><ul><li>0,10 </li></ul><ul><li>@10,0 </li></ul><ul><li>@20,20 </li></ul><ul><li>@-20,0 </li></ul><ul><li>@10,20 </li></ul><ul><li>@10 </li></ul><ul><li>(X,Y) </li></ul>
14. 14. 2.1 Basic Graphic Knoledge <ul><li>Exercise: Using your notebook grid mark this points: </li></ul><ul><li>0,10 </li></ul><ul><li>@10,0 </li></ul><ul><li>@20,20 </li></ul><ul><li>@-20,0 </li></ul><ul><li>@10,20 </li></ul><ul><li>@10 </li></ul><ul><li>(X,Y) </li></ul>
15. 15. 2.2 Relativa, Absolute and polar cordinates Exercise: Using Qcad mark this points: 0,10 10,10 10,30 20,50 30,30 30, 10 (40,10) (40,0) (X,Y)
16. 16. 2.2 Relativa, Absolute and polar cordinates <ul><li>Exercise: Using Qcad mark this points: </li></ul><ul><li>0,10 </li></ul><ul><li>@10,0 </li></ul><ul><li>@20,20 </li></ul><ul><li>@-20,0 </li></ul><ul><li>@10,20 </li></ul><ul><li>@10 </li></ul><ul><li>(X,Y) </li></ul>
17. 17. 2.2 Relative, Absolute and Polar coordinates <ul><li>Welcome to Qcad </li></ul>
18. 18. 2.2 Relative, Absolute and Polar coordinates <ul><li>We can use Qcad to draw points clicking on </li></ul><ul><li>Then we have to decide what type of coordinate we are using: </li></ul><ul><li>Absolute: and write the (x,y) below </li></ul><ul><li>Relative: and write the (x,y) below </li></ul><ul><li>Polar: complete the gaps </li></ul>
19. 19. 2.2 Relativa, Absolute and polar cordinates Exercise: Using Qcad mark this points: 0,10 10,10 10,30 20,50 30,30 30, 10 (40,10) (40,0) (X,Y)
20. 20. 2.1 Basic Graphic Knoledge <ul><li>Exercise: draw these points. </li></ul><ul><li>P 1 =(5,70º) </li></ul><ul><li>P 2 =(10, 180º) </li></ul><ul><li>P 3 =(-4,20º) </li></ul><ul><li>P 4 =(5, -45º) </li></ul>Grid reference
21. 21. 2.2 Relativa, Absolute and polar cordinates <ul><li>Exercise: Using Qcad mark this points: </li></ul><ul><li>0,10 </li></ul><ul><li>@10,0 </li></ul><ul><li>@20,20 </li></ul><ul><li>@-20,0 </li></ul><ul><li>@10,20 </li></ul><ul><li>@10 </li></ul><ul><li>(X,Y) </li></ul>
22. 22. 2.3 Lines, Squares, Circules <ul><li>Exercise using absolute coordinates draw this views </li></ul>
23. 23. 2.3 Lines, Squares, Circules <ul><li>Marking: Mark, using parallel marking these objects. </li></ul>
24. 24. 2.4 Views of an object <ul><li>Draw this object using Qcad. </li></ul>
25. 25. 2.5 Marking <ul><li>Marking: Mark, using parallel marking these objects. </li></ul>
26. 26. 2.6 Perspective Regular objects are drawn using the caballera perspective All lines are parallel to Z, X or Y axes
27. 27. 2.6 Perspective Caballera: X and Y axes form a 90º angle and Z axe form a 135º angle Z axe Y axe X axe 90º 90º 135º
28. 28. 2.6 Perspective systems In X and Y axes measures are applied directly. But, in order to create a human vision of the object, Z axe form a 135º angle and measures have a ½ reduction ½ reduction in all z measures
29. 30. 10 10 10