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#include <string.h>
#include "Text.h"
void Text::BuildFont() // Build Our Font Display List
{
float cx; // Holds Our X Character Coord
float cy; // Holds Our Y Character Coord
int loop;
base=glGenLists(256); // Creating 256 Display Lists
glBindTexture(GL_TEXTURE_2D, FontTexture); // Select Our Font Texture
for (loop=0; loop<256; loop++) // Loop Through All 256 Lists
{
cx=float(loop%16)/16.0f; // X Position Of Current Character
cy=float(loop/16)/16.0f; // Y Position Of Current Character
glNewList(base+loop,GL_COMPILE); // Start Building A List
glBegin(GL_QUADS); // Use A Quad For Each Character
glTexCoord2f(cx,1-cy-0.0625f+.001); // Texture Coord (Bottom Left)
glVertex2i(0,0); // Vertex Coord (Bottom Left)
glTexCoord2f(cx+0.0625f,1-cy-0.0625f+.001); // Texture Coord (Bottom Right)
glVertex2i(16,0); // Vertex Coord (Bottom Right)
glTexCoord2f(cx+0.0625f,1-cy-.001); // Texture Coord (Top Right)
glVertex2i(16,16); // Vertex Coord (Top Right)
glTexCoord2f(cx,1-cy-+.001); // Texture Coord (Top Left)
glVertex2i(0,16); // Vertex Coord (Top Left)
glEnd(); // Done Building Our Quad (Character)
glTranslated(10,0,0); // Move To The Right Of The Character
glEndList(); // Done Building The Display List
} // Loop Until All 256 Are Built
}
void Text::glPrint(GLint x, GLint y, char *string, int set, float size, float width, float height) // Where The Printing Happens
{
if (set>1)
{
set=1;
}
glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
glBindTexture(GL_TEXTURE_2D, FontTexture); // Select Our Font Texture
glDisable(GL_DEPTH_TEST); // Disables Depth Testing
glDisable(GL_LIGHTING);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
glMatrixMode(GL_PROJECTION); // Select The Projection Matrix
glPushMatrix(); // Store The Projection Matrix
glLoadIdentity(); // Reset The Projection Matrix
glOrtho(0,width,0,height,-100,100); // Set Up An Ortho Screen
glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix
glPushMatrix(); // Store The Modelview Matrix
glLoadIdentity();
glScalef(size,size,1); // Reset The Modelview Matrix
glTranslated(x,y,0); // Position The Text (0,0 - Bottom Left)
glListBase(base-32+(128*set)); // Choose The Font Set (0 or 1)
glCallLists(strlen(string),GL_BYTE,string); // Write The Text To The Screen
glMatrixMode(GL_PROJECTION); // Select The Projection Matrix
glPopMatrix(); // Restore The Old Projection Matrix
glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix
glPopMatrix(); // Restore The Old Projection Matrix
glEnable(GL_DEPTH_TEST); // Enables Depth Testing
glTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
}
Text::~Text()
{
glDeleteTextures(1, &FontTexture);
}
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