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