Lection on 2d graphics in openframeworks drawing images transparency offscreen buffer.
Glvertex2f gltexcoord2f rubber sheet.
The first value of gltexcoord2f is the x coordinate.
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A 1 a 2 a 3 a 4.
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0 5f is the middle of the texture and 1 0f is the right side of the texture.
A b c d e f g h i j k l m n o p q r s t u v w x y z pm get page info mld to node 3 retrieve placement information daemonize 3.
Gl glvertex2f 0 0f destpoint x 0 0f destpoint y.
1 evaluates conditional expressions 3dborder 3 draw borders with three dimensional appearance a2ps 1 format files for printing on a postscript printer a64l 3 conver.
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We will discuss art graphics sound computer vision opencv osc and arduino all in connection to openframeworks with many examples.
0 0f is the bottom of the texture.
Imagine that sheet of paper was made of rubber so that you could stretch it.
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Get a second piece of transparent paper and try to align them so.
Lections on openframeworks and interactive multimedia.
Stretching would be the texture mapping process.
Multiple sheets of paper placed on a desk with projected graphics figure 2 16.
The lower left corner not the pixel of the texture is at 0 0 the upper right corner is at 1 1.
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0 0f is the left side of the texture.
The second value of gltexcoord2f is the y coordinate.
Generative art creative coding.
When drawing a triangle to the screen the exact position on screen doesn t matter the texture rubber sheet is cut out according to the texture coordinates and stretched onto the triangle as specified by the texture coordinates.
Think textures as being rubber sheets.
Preliminaries vectors and vector products.
0 5f is the middle of the texture and 1 0f is the top of the texture.
