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Cos
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[edit] Definition
FLOAT cos ( <FLOAT angle> )
Returns the cosine of the specified angle.
This function performs a cosine calculation on a certain angle and returns a value between -1 and 1.
[edit] Parameters
FLOAT angle | - Angle, in thousandths of degrees. i.e. 75000 = 75º |
[edit] Returns
FLOAT : The cosine result of the specified angle.
[edit] Notes
The angle value used in this function should be in thousandths of degrees, as most angles within Fenix are.
To read about all aspects of trigonometry, you can visit Wikipedia's Trigonometric function page.
[edit] Example
Const screen_width = 320; screen_height = 200; screen_border = 15; End Global float value; End Process Main() Begin // Modes set_title("Cosine Graph"); set_mode(screen_width,screen_height); // X axis for(x=1;x<=8;x++) write( 0, screen_border+x*(screen_width-screen_border)/8+3, screen_height-1, 8, itoa(x*360/8 )+"^" ); end draw_line(1,screen_height-screen_border,screen_width,screen_height-screen_border); // Y axis write(0,screen_border-1,20,5,"1"); write(0,screen_border-1,screen_height/2,5,"0"); write(0,screen_border-1,screen_height-20,5,"-1"); draw_line(screen_border,1,screen_border,screen_height-1); // Draw tangent for(angle=0;angle<360;angle++) value=cos(angle*1000)*(screen_height/2-20); put_pixel( screen_border+angle*(screen_width-screen_border)/360, screen_height/2-value, rgb(255,255,255) ); // screen_height/2-value because the screen's origin (0,0) is topleft instead of downleft. end Repeat frame; Until(key(_ESC)) End
Used in example: set_title(), set_mode(), write(), draw_line(), cos(), put_pixel(), key()
This will result in something like:
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Math Functions | |
• Abs() • Acos() • Asin() • Atan() • Cos() • Fget_angle() • Fget_dist() • Get_distx() • Get_disty() • Pow() • Rand() • Rand_seed() • Sin() • Sqrt() • Tan() • |