Help-trig for sphere z points

The forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.

Ryan Burnside

The second code block I posted works. Did you TRY it?
I posted a working code, it just draws the points, I need faces drawn. I don't know how to define the faces. I had assumed that somebody could make the jump from drawn vertices to drawn faces.

Here is a complete program showing it.

Strict
GLGraphics 640,480
glEnable GL_DEPTH_TEST								'Enables Depth Testing
glMatrixMode GL_PROJECTION						'Select The Projection Matrix
glLoadIdentity										'Reset The Projection Matrix

 glOrtho(0,640,480,0,-1000,1000)				'Setup The Projection Matrix Frustum

glMatrixMode GL_MODELVIEW							'Select The ModelView Matrix
glLoadIdentity										'Reset The ModelView Matrix


Function draw_sphere(x#,y#,z#,x_divisions#,y_divisions#,radius#)

	
	Local sub#=180/y_divisions
	Local sub2#=360/x_divisions
	Local base=0
	For Local a#=0 To x_divisions
		glLoadIdentity()
		glTranslatef x,y,z
		glRotatef a*sub2,0,1,0
			glBegin GL_points
		For Local i#=0 To y_divisions
			' first point
			Local POINT_X#=Cos((i*sub)-90)*radius
			Local POINT_Y#=Sin((i*sub)-90)*radius
			
			glColor3f 1,1,1
			' draw points
			glVertex3f POINT_X,POINT_Y,0
			
	

			
		Next
		glEnd
	
	Next
	
End Function

While Not KeyHit( KEY_ESCAPE )

	glClear GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT		'Clear The Screen And The Depth Buffer
draw_sphere(320,240,0,20,20,100)
	Flip

Wend