Processing 2. Креативное программирование

3D:

}else if ( lightDirection == 3 ) { directionalLight( 0, 255, 255, -1, 0, 0 ); // LEFT

}

break; case 3:

ambientLight( 0, 255, 255 ); break;

case 4:

pointLight( 255, 255, 0, 100, height*0.3, 100 ); break;

case 5:

spotLight( 128, 255, 128, 800, 20, 300, -1, .25, 0, PI, 2 );

break;

default:

noLights();

}

.rotateY() rotateX() .

pushMatrix();

translate( width/2, height/2, 0 );

pushMatrix();

rotateY( radians( frameCount ) ); fill( 255 );

noStroke(); sphere( 100 ); popMatrix();

pushMatrix();

rotateZ( radians( frameCount ) ); rotateX( radians( frameCount/2 ) ); fill( 255 );

noStroke(); box( 150 ); popMatrix();

popMatrix();

70

3

- . . , , 1,

Processing 2.

void keyPressed()

{

switch ( key ) { case 'n':

lightMode = 0; // no lights break;

case 'l':

lightMode = 1; // lights break;

case 'd':

lightMode = 2; // directional light break;

case 'a':

lightMode = 3; // ambient light break;

case 'p':

lightMode = 4; // point light break;

case 's':

lightMode = 5; // spot light break;

}

if ( key == CODED ) { switch ( keyCode ) {

case UP: lightDirection = 0; break;

case RIGHT: lightDirection = 1; break;

case DOWN: lightDirection = 2; break;

case LEFT: lightDirection = 3; break;

}

}

}

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3D:

,N, L, D, A, P S. - ,.

- lights(). ,Processing . noLights(). , , - noLights().

directionalLight().. , . - r, g b .x, y z. -11.

ambientLight() .. . r, g b ..

pointLight() . ., - x, y z -.

72

3

spotLight(). . , - x, y z . 7, 8 9 x, y z,, directionalLight(). - . , . -.

polygon soup

3D , Processing :. , ,3D- . ,

.

, OpenGL640 x 480 . -. , -..

void cylinder( int numSegments, float h, float r )

{

float angle = 360.0 / (float)numSegments;

//top beginShape();

for ( int i = 0; i < numSegments; i++ ) { float x = cos( radians( angle * i ) ) * r; float y = sin( radians( angle * i ) ) * r; vertex( x, y, -h/2 );

}

endShape( CLOSE );

//side

73

3D:

endShape();

// bottom beginShape();

for ( int i = 0; i < numSegments; i++ ) { float x = cos( radians( angle * i ) ) * r; float y = sin( radians( angle * i ) ) * r; vertex( x, y, h/2 );

}

endShape( CLOSE );

}

, , . draw():

background( 255 );

pushMatrix();

translate( width*.3, height*.3, 0 ); rotateY( radians( frameCount ) ); fill( 255, 0, 0 );

cylinder( 30, 100, 50 ); popMatrix();

pushMatrix();

translate( width*.7, height*.5, 0 ); rotateY( radians( frameCount ) ); fill( 255, 255, 0 );

cylinder( 4, 200, 50 ); popMatrix();

pushMatrix();

translate( width*.3, height*.7, 0 ); rotateY( radians( frameCount ) ); fill( 0, 0, 255 );

cylinder( 3, 200, 30 ); popMatrix();

74

3

, , . cylinder(),.

Polygon soup , , , - . ,, , 3D , ..

.. -.

- QUAD_STRIPbeginShape(). -..

75

3D:

3D- ,Hemesh . -, . http://hemesh.wblut.com/.

2D 3D

ၘၖၧၩၠၙၤၡၯၝ. , . ,.

, , OpenGL 640 x 480 .. -n. 3D-. :

import processing.opengl.*;

float n;

void setup()

{

size( 640, 480, OPENGL ); n = 0.0f;

}

- . n 0.01, .draw() , .

hint( ENABLE_DEPTH_TEST ); n += 0.01;

background( 255 ); lights();

noStroke();

fill( 255, 128, 0 );

pushMatrix();

for ( int i = 0; i < 17; i++ ) { for ( int j = 0; j < 13; j++ ) {

pushMatrix();

fill( i * 15, 0, j * 19 );

76

3

translate( i * 40, j * 40 );

rotateY( radians( i * 10 + frameCount ) ); rotateZ( radians( i * 10 + frameCount ) ); box( noise( i, j, n ) * 40 ); popMatrix();

}

}

popMatrix();

draw() . z., , .

noLights();

fill( 0 ); stroke( 0 );

rect( 320, 40, 200, 200 );

hint( DISABLE_DEPTH_TEST ); fill( 255 );

rect( 320, 240, 200, 200 );

, . , , , .

77

3D:

hint() . . ENABLE_DEPTH_TEST draw() z. DISABLE_ DEPTH_TEST z,.

... .

OpenGL 640 x 480. , - . -draw(). , beginShape(), for .

background( 255 ); lights();

pushMatrix();

translate( width/2, height/2, 0 ); rotateY( radians( frameCount ) );

pushMatrix();

rotateZ( radians( frameCount ) );

fill( 255, 0, 0 );

beginShape( TRIANGLE_STRIP ); for ( int i = 0; i < 20; i++ ) {

float x1 = cos( radians( i * 10 ) ) * 100; float y1 = sin( radians( i * 10 ) ) * 100;

float x2 = cos( radians( i * 10 + 5 ) ) * ( 180 - i * 4 ); float y2 = sin( radians( i * 10 + 5 ) ) * ( 180 - i * 4 );

vertex( x1, y1, 0 ); vertex( x2, y2, 50 + i );

}

endShape();

popMatrix();

78

3

, - . , QUAD_STRIP beginShape() x, y z .

pushMatrix();

translate( 0, 0, -100 );

rotateZ( radians( -frameCount ) );

fill( 255, 255, 0 );

beginShape( QUAD_STRIP );

for ( int i = 0; i < 20; i++ ) {

float x1 = cos( radians( i * 10 ) ) * ( 100 + i * 5 ); float y1 = sin( radians( i * 10 ) ) * ( 100 + i * 5 ); float x2 = cos( radians( i * 10 + 5 ) ) * 180;

float y2 = sin( radians( i * 10 + 5 ) ) * 180;

vertex( x1, y1, 0 );

vertex( x2, y2, 80 + i * 2 );

}

endShape();

popMatrix();

popMatrix();

, ., - .

79