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added multitexture support

This commit is contained in:
Brian Paul 2001-05-21 17:45:25 +00:00
parent 3893e638e6
commit 300e1056f5
1 changed files with 74 additions and 25 deletions
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99
progs/tests/texline.c
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@ -1,4 +1,4 @@
/* $Id: texline.c,v 1.2 2001/01/23 23:44:39 brianp Exp $ */ /* $Id: texline.c,v 1.3 2001/05/21 17:45:25 brianp Exp $ */
/* /*
* Test textured lines. * Test textured lines.
@ -17,12 +17,14 @@
#define TEXTURE_FILE "../images/girl.rgb" #define TEXTURE_FILE "../images/girl.rgb"
static GLboolean Antialias = GL_FALSE; static GLboolean Antialias = GL_FALSE;
static GLboolean Animate = GL_TRUE; static GLboolean Animate = GL_FALSE;
static GLboolean Texture = GL_TRUE; static GLboolean Texture = GL_TRUE;
static GLfloat LineWidth = 1.0; static GLfloat LineWidth = 1.0;
static GLboolean Multitex = GL_FALSE;
static GLfloat Xrot = -60.0, Yrot = 0.0, Zrot = 0.0; static GLfloat Xrot = -60.0, Yrot = 0.0, Zrot = 0.0;
static GLfloat DYrot = 1.0; static GLfloat DYrot = 1.0;
static GLboolean Points = GL_FALSE;
static void Idle( void ) static void Idle( void )
@ -36,7 +38,7 @@ static void Idle( void )
static void Display( void ) static void Display( void )
{ {
GLfloat x, t; GLfloat x, y, s, t;
glClear( GL_COLOR_BUFFER_BIT ); glClear( GL_COLOR_BUFFER_BIT );
@ -48,17 +50,38 @@ static void Display( void )
if (Texture) if (Texture)
glColor3f(1, 1, 1); glColor3f(1, 1, 1);
glBegin(GL_LINES); if (Points) {
for (t = 0.0; t <= 1.0; t += 0.025) { glBegin(GL_POINTS);
x = t * 2.0 - 1.0; for (t = 0.0; t <= 1.0; t += 0.025) {
if (!Texture) for (s = 0.0; s <= 1.0; s += 0.025) {
glColor3f(1, 0, 1); x = s * 2.0 - 1.0;
glTexCoord2f(t, 0.0); glVertex2f(x, -1.0); y = t * 2.0 - 1.0;
if (!Texture) if (!Texture)
glColor3f(0, 1, 0); glColor3f(1, 0, 1);
glTexCoord2f(t, 1.0); glVertex2f(x, 1.0); glMultiTexCoord2fARB(GL_TEXTURE1_ARB, t, s);
glTexCoord2f(s, t);
glVertex2f(x, y);
}
}
glEnd();
}
else {
glBegin(GL_LINES);
for (t = 0.0; t <= 1.0; t += 0.025) {
x = t * 2.0 - 1.0;
if (!Texture)
glColor3f(1, 0, 1);
glTexCoord2f(t, 0.0);
glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 0.0, t);
glVertex2f(x, -1.0);
if (!Texture)
glColor3f(0, 1, 0);
glTexCoord2f(t, 1.0);
glMultiTexCoord2fARB(GL_TEXTURE1_ARB, 1.0, t);
glVertex2f(x, 1.0);
}
glEnd();
} }
glEnd();
glPopMatrix(); glPopMatrix();
@ -88,11 +111,13 @@ static void Key( unsigned char key, int x, int y )
Antialias = !Antialias; Antialias = !Antialias;
if (Antialias) { if (Antialias) {
glEnable(GL_LINE_SMOOTH); glEnable(GL_LINE_SMOOTH);
glEnable(GL_POINT_SMOOTH);
glEnable(GL_BLEND); glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
} }
else { else {
glDisable(GL_LINE_SMOOTH); glDisable(GL_LINE_SMOOTH);
glDisable(GL_POINT_SMOOTH);
glDisable(GL_BLEND); glDisable(GL_BLEND);
} }
break; break;
@ -108,12 +133,26 @@ static void Key( unsigned char key, int x, int y )
if (LineWidth < 0.25) if (LineWidth < 0.25)
LineWidth = 0.25; LineWidth = 0.25;
glLineWidth(LineWidth); glLineWidth(LineWidth);
glPointSize(LineWidth);
break; break;
case 'W': case 'W':
LineWidth += 0.25; LineWidth += 0.25;
if (LineWidth > 8.0) if (LineWidth > 8.0)
LineWidth = 8.0; LineWidth = 8.0;
glLineWidth(LineWidth); glLineWidth(LineWidth);
glPointSize(LineWidth);
break;
case 'm':
Multitex = !Multitex;
if (Multitex) {
glEnable(GL_TEXTURE_2D);
}
else {
glDisable(GL_TEXTURE_2D);
}
break;
case 'p':
Points = !Points;
break; break;
case ' ': case ' ':
Animate = !Animate; Animate = !Animate;
@ -126,7 +165,7 @@ static void Key( unsigned char key, int x, int y )
exit(0); exit(0);
break; break;
} }
printf("Width %f\n", LineWidth); printf("LineWidth, PointSize = %f\n", LineWidth);
glutPostRedisplay(); glutPostRedisplay();
} }
@ -157,18 +196,27 @@ static void SpecialKey( int key, int x, int y )
static void Init( int argc, char *argv[] ) static void Init( int argc, char *argv[] )
{ {
glEnable(GL_TEXTURE_2D); GLuint u;
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); for (u = 0; u < 2; u++) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glActiveTextureARB(GL_TEXTURE0_ARB + u);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glBindTexture(GL_TEXTURE_2D, 10+u);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); if (u == 0 || Multitex)
glEnable(GL_TEXTURE_2D);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); if (u == 0)
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
else
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_ADD);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1); glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) { if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
printf("Error: couldn't load texture image\n"); printf("Error: couldn't load texture image\n");
exit(1); exit(1);
}
} }
if (argc > 1 && strcmp(argv[1], "-info")==0) { if (argc > 1 && strcmp(argv[1], "-info")==0) {
@ -195,7 +243,8 @@ int main( int argc, char *argv[] )
glutKeyboardFunc( Key ); glutKeyboardFunc( Key );
glutSpecialFunc( SpecialKey ); glutSpecialFunc( SpecialKey );
glutDisplayFunc( Display ); glutDisplayFunc( Display );
glutIdleFunc( Idle ); if (Animate)
glutIdleFunc( Idle );
glutMainLoop(); glutMainLoop();
return 0; return 0;