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**CSC 123 – Computational Art Introduction to Shape and composition**

Zoë Wood

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**What is art…? Shapes Composition Color/shading Texture Story**

We like triangles, circles and squares… Especially triangles… Composition Color/shading Warm/cool Near/far Texture Story

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Circles George Tooker Da Vinci Sunflowers, Van Gogh

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**ellipse Circles in Processing: ellipse(200, 150, 250, 250);**

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**Arcs Circles in Processing: noStroke();**

arc(200, 200,200, 200, 0, PI+HALF_PI); arc(220, 180,200, 200, PI+HALF_PI, TWO_PI);

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Rectangles Cezanne

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**Rectangles Rectangles: background(255); stroke(0); strokeWeight(5);**

strokeJoin(ROUND); fill(255, 0, 0); rect(20, 100, 300, 55); noFill(); rect(10, 0, 20, 400); rect(30, 0, 20, 400); rect(310, 0, 40, 400); rect(0, 340, 400, 25); rect(0, 75, 400, 25); fill(243, 252, 3); rect(350, 370, 100, 100);

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**Quads Quads: background(255); stroke(108, 79, 42); fill(108, 79, 42);**

strokeWeight(5); strokeJoin(ROUND); quad(110, 20, 231, 28, 276, 287, 12, 301); fill(178, 123, 50); quad(120, 40, 223, 32, 289, 293, 12, 301);

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Triangles Monet’s Saint Lazare Station Cezanne Van Gogh

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**Triangles Triangles fill(255, 255, 255, 160);**

stroke(125, 125, 125, 255); triangle(310, 380, 20, 380, 340, 150); stroke(0); triangle(20, 380, 150, 50, 310, 380); triangle(150, 50, 340, 150, 310, 380);

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**Shapes 1. line(x1, y1, x2, y2) 2. triangle(x1, y1, x2, y2, x3, y3)**

3. quad(x1, y1, x2, y2, x3, y3, x4, y4) 4. rect(x, y, width, height) 5. ellipse(x, y, width, height) 6. arc(x, y, width, height, start, stop)

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2D co-ordinate system In order for the points we specify to make sense, we must know with respect to what coordinate system we are using

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2D co-ordinate system Unlike most mathematical conventions Processing’s coordinate system has (0, 0) in the upper left hand corner

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Order Clockwise! Radians to degree

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**Composition Fill scene Balance scene Golden ratio Cezanne Da Vinci**

Seurat’s Bathers at Snieres Cezanne Da Vinci

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**Composition Balance and fill Sunflowers, Van Gogh**

The car has passed, G. Balla

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Balancing light Monet’s Saint Lazare Station

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**Summary Variety of shapes available in Processing**

Consider your composition Balance Fill scene

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ART ELEMENTS and ART PRINCIPLES.

ART ELEMENTS and ART PRINCIPLES.

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