Figured it out

Shamino · 11-06-2005, 12:26 AM

There it is, vertex array, my simple primitive, if I were to use this, in conjunction with a high speed grid drawing function, we'd have a beautifully smooth program

Code:

float array[9] = {1.0, -1.0, 0.0,								// 3 coordinates per vertex
                     0.0, 1.0, 0.0,								// Using GLFloat as the data type
                     -1.0, -1.0, 0.0};							// Assume that there is no padding between coordinate values
	glVertexPointer(3, GL_FLOAT, 0, array);						// Pointer to the first element in the array

	glEnableClientState(GL_VERTEX_ARRAY);
		glDrawArrays(GL_TRIANGLES, 0, 3);
	glDisableClientState(GL_VERTEX_ARRAY);

Fast Grid Drawer thing

Code:

void DrawSquare(int left, int top, int right, int bottom)
{
	glBegin(GL_LINES);
	glColor4f(1, 1, 1, 1);
	glVertex2d(left, top);
	glVertex2d(right, top);

	glVertex2d(right, top);
	glVertex2d(right, bottom);

	glVertex2d(right, bottom);
	glVertex2d(left, bottom);

	glVertex2d(left, bottom);
	glVertex2d(left, top);
	glEnd();
}

void DrawGrid(int left, int top, int right, int bottom, int w, int h)
{
	for(int i=left; i<right; i+= w)
	{
		for(int o=top; o<bottom; o+= h)
		{
			DrawSquare(i,o,i+w,o+h );
		}
	}
}

Then we use the vertex arrays to draw a primitive when I click a certain area of the grid and colorfy it...

remove all those stupid unecessary loops.... yeah... smooth program, thanks all who have helped

I can do this
Seats Seat[392]

because element=row*width+column, I can get to a certain section very easily....

instead of Seats Seat[3][14][28]....

and then translatef with a much better algorithm

definately not

Code:

				s[0][k][j].x=k*19.0f;	
				s[0][k][j].y=j*19.0f;					
				glTranslatef(s[0][k][j].x,s[0][k][j].y,0.0f);

instead of doing that, i'll make an algorithm to detect mouse detection, and create a quad on demand with a mouse click to make the color changes and the seat will be sold...

that is the program killer right there, its making everything slow, if edited out, program runs beautifully....

something is making me think, why do i need to fudge with s[][][].x at all? why do i have the x/y in the structure? I don't need to store that information, i don't need that info at all, because i'm drawing the grid with lines, and then im creating the quads at a mouse click with vertex arrays, which are uber fast and dynamic, therefore I can change the stuff in them, and draw different things, thats uber!

Perspective · 11-06-2005, 12:43 AM

For something static like that you might get better performance using pre-compiled display lists.

Code:

GLuint list = glGenLists((GLuint) 1);

glNewList(list, GL_COMPILE);
/* all your draw commands go here */
glEndList();

/* call it with */
glTranslate( /* object coords */ );
glCallList(list);

Shamino · 11-06-2005, 12:55 AM

the drawing method isn't really my lag issue, its data management, the 3d array is a destroyer, translating with it = death to processor

11-06-2005, 12:26 AM	#1
Shamino Absent Minded Programmer Join Date: May 2005 Posts: 933	Figured it out There it is, vertex array, my simple primitive, if I were to use this, in conjunction with a high speed grid drawing function, we'd have a beautifully smooth program Code: float array[9] = {1.0, -1.0, 0.0, // 3 coordinates per vertex 0.0, 1.0, 0.0, // Using GLFloat as the data type -1.0, -1.0, 0.0}; // Assume that there is no padding between coordinate values glVertexPointer(3, GL_FLOAT, 0, array); // Pointer to the first element in the array glEnableClientState(GL_VERTEX_ARRAY); glDrawArrays(GL_TRIANGLES, 0, 3); glDisableClientState(GL_VERTEX_ARRAY); Fast Grid Drawer thing Code: void DrawSquare(int left, int top, int right, int bottom) { glBegin(GL_LINES); glColor4f(1, 1, 1, 1); glVertex2d(left, top); glVertex2d(right, top); glVertex2d(right, top); glVertex2d(right, bottom); glVertex2d(right, bottom); glVertex2d(left, bottom); glVertex2d(left, bottom); glVertex2d(left, top); glEnd(); } void DrawGrid(int left, int top, int right, int bottom, int w, int h) { for(int i=left; i<right; i+= w) { for(int o=top; o<bottom; o+= h) { DrawSquare(i,o,i+w,o+h ); } } } Then we use the vertex arrays to draw a primitive when I click a certain area of the grid and colorfy it... remove all those stupid unecessary loops.... yeah... smooth program, thanks all who have helped I can do this Seats Seat[392] because element=rowwidth+column, I can get to a certain section very easily.... instead of Seats Seat[3][14][28].... and then translatef with a much better algorithm definately not Code: s[0][k][j].x=k19.0f; s[0][k][j].y=j19.0f; glTranslatef(s[0][k][j].x,s[0][k][j].y,0.0f); instead of doing that, i'll make an algorithm to detect mouse detection, and create a quad on demand with a mouse click to make the color changes and the seat will be sold... that is the program killer right there, its making everything slow, if edited out, program runs beautifully.... something is making me think, why do i need to fudge with s[][][].x at all? why do i have the x/y in the structure? I don't need to store that information, i don't need that info at all, because i'm drawing the grid with lines, and then im creating the quads at a mouse click with vertex arrays, which are uber fast and* dynamic, therefore I can change the stuff in them, and draw different things, thats uber! Last edited by Shamino; 11-06-2005 at 12:39 AM.
Shamino is offline

11-06-2005, 12:43 AM	#2
Perspective Crazy Fool Join Date: Jan 2003 Location: Canada Posts: 2,596	For something static like that you might get better performance using pre-compiled display lists. Code: GLuint list = glGenLists((GLuint) 1); glNewList(list, GL_COMPILE); /* all your draw commands go here / glEndList(); / call it with / glTranslate( / object coords */ ); glCallList(list); __________________ jeff.bagu.org - Terrain rendering and other random stuff
Perspective is offline

11-06-2005, 12:55 AM	#3
Shamino Absent Minded Programmer Join Date: May 2005 Posts: 933	the drawing method isn't really my lag issue, its data management, the 3d array is a destroyer, translating with it = death to processor
Shamino is offline

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