Drawing Tools

A Lecture by Abdul Ghaffar on Drawing Tools Reference Chapter #3 of text book

World, Windows, Viewports ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3.2.1 Window to viewport mapping ,[object Object]

3.2.1 Window to viewport mapping ,[object Object],[object Object]

3.2.1 Window to viewport mapping ,[object Object],[object Object],[object Object]

3.2.1 Window to viewport mapping ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3.2.1 Window to viewport mapping ,[object Object],[object Object],(x,y) W.t W.b W.l W.r (sx,sy) V.t V.b V.l V.r W V x sx y sy

Derivation for sx: ,[object Object]

Doing it in OpenGL void glOrtho2D (GLdouble left, GLdouble right, GLdouble bottom, GLdouble top) void glViewport (GLlint x, GLlint y, GLlint Width, GLlint Height)

3.2.2 Setting the window and viewport automatically ,[object Object]

3.2.2 Setting the window and viewport automatically ,[object Object],[object Object],[object Object]

Self study and exercises: ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Chapter 3: Windows, viewports ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3.3.2 Cohen-Sutherland clipping ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3.3.2 Cohen-Sutherland clipping ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3.3.2 Cohen-Sutherland clipping ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3.3.2 Cohen-Sutherland clipping ,[object Object]

3.3.2 Cohen-Sutherland clipping (Complete Algorithm:)

Chapter 3: Windows, viewports ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Chapter 3: Windows, viewports ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3.6 Figures based on regular polygons ,[object Object],[object Object]

Chapter 3: Windows, viewports ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Chapter 3: Windows, viewports ,[object Object]

Chapter 3: Windows, viewports ,[object Object],[object Object],[object Object],[object Object],[object Object],Super Ellipse: n=1 -> Square n<1 -a Inward n>1 -> outward

Chapter 3: Windows, viewports ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Drawing Tools

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