diff options
Diffstat (limited to 'progs/demos/multiarb.c')
| -rw-r--r-- | progs/demos/multiarb.c | 123 |
1 files changed, 65 insertions, 58 deletions
diff --git a/progs/demos/multiarb.c b/progs/demos/multiarb.c index d963985c6..451fd11ef 100644 --- a/progs/demos/multiarb.c +++ b/progs/demos/multiarb.c @@ -1,4 +1,3 @@ - /* * GL_ARB_multitexture demo * @@ -32,7 +31,6 @@ static GLint NumUnits = 1; static GLboolean TexEnabled[8]; static GLfloat Drift = 0.0; -static GLfloat drift_increment = 0.005; static GLfloat Xrot = 20.0, Yrot = 30.0, Zrot = 0.0; @@ -41,9 +39,7 @@ static void Idle( void ) if (Animate) { GLint i; - Drift += drift_increment; - if (Drift >= 1.0) - Drift = 0.0; + Drift = glutGet(GLUT_ELAPSED_TIME) * 0.001; for (i = 0; i < NumUnits; i++) { glActiveTextureARB(GL_TEXTURE0_ARB + i); @@ -57,10 +53,11 @@ static void Idle( void ) glTranslatef(0.0, Drift, 0.0); } else { - glTranslatef(0.5, 0.5, 0.0); + float tx = 0.5, ty = 0.5; + glTranslatef(tx, ty, 0.0); glRotatef(180.0 * Drift, 0, 0, 1); glScalef(1.0/i, 1.0/i, 1.0/i); - glTranslatef(-0.5, -0.5, 0.0); + glTranslatef(-tx, -ty + i * 0.1, 0.0); } } glMatrixMode(GL_MODELVIEW); @@ -72,10 +69,9 @@ static void Idle( void ) static void DrawObject(void) { - GLint i; - GLint j; - static const GLfloat tex_coords[] = { 0.0, 0.0, 1.0, 1.0, 0.0 }; - static const GLfloat vtx_coords[] = { -1.0, -1.0, 1.0, 1.0, -1.0 }; + static const GLfloat tex_coords[] = { 0.0, 0.0, 1.0, 1.0, 0.0 }; + static const GLfloat vtx_coords[] = { -1.0, -1.0, 1.0, 1.0, -1.0 }; + GLint i, j; if (!TexEnabled[0] && !TexEnabled[1]) glColor3f(0.1, 0.1, 0.1); /* add onto this */ @@ -83,37 +79,20 @@ static void DrawObject(void) glColor3f(1, 1, 1); /* modulate this */ glBegin(GL_QUADS); - - /* Toggle between the vector and scalar entry points. This is done purely - * to hit multiple paths in the driver. - */ - if ( Drift > 0.49 ) { - for (j = 0; j < 4; j++ ) { - for (i = 0; i < NumUnits; i++) - glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, - tex_coords[j], tex_coords[j+1]); - glVertex2f( vtx_coords[j], vtx_coords[j+1] ); - } - } - else { - for (j = 0; j < 4; j++ ) { - for (i = 0; i < NumUnits; i++) - glMultiTexCoord2fvARB(GL_TEXTURE0_ARB + i, & tex_coords[j]); - glVertex2fv( & vtx_coords[j] ); + for (j = 0; j < 4; j++ ) { + for (i = 0; i < NumUnits; i++) { + if (TexEnabled[i]) + glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, + tex_coords[j], tex_coords[j+1]); } + glVertex2f( vtx_coords[j], vtx_coords[j+1] ); } - glEnd(); } - static void Display( void ) { - static GLint T0 = 0; - static GLint Frames = 0; - GLint t; - glClear( GL_COLOR_BUFFER_BIT ); glPushMatrix(); @@ -125,16 +104,6 @@ static void Display( void ) glPopMatrix(); glutSwapBuffers(); - - Frames++; - - t = glutGet(GLUT_ELAPSED_TIME); - if (t - T0 >= 250) { - GLfloat seconds = (t - T0) / 1000.0; - drift_increment = 2.2 * seconds / Frames; - T0 = t; - Frames = 0; - } } @@ -151,24 +120,34 @@ static void Reshape( int width, int height ) } +static void ToggleUnit(int unit) +{ + TexEnabled[unit] = !TexEnabled[unit]; + glActiveTextureARB(GL_TEXTURE0_ARB + unit); + if (TexEnabled[unit]) + glEnable(GL_TEXTURE_2D); + else + glDisable(GL_TEXTURE_2D); + printf("Enabled: "); + for (unit = 0; unit < NumUnits; unit++) + printf("%d ", (int) TexEnabled[unit]); + printf("\n"); +} + + static void ModeMenu(int entry) { if (entry >= TEX0 && entry <= TEX7) { /* toggle */ GLint i = entry - TEX0; - TexEnabled[i] = !TexEnabled[i]; - glActiveTextureARB(GL_TEXTURE0_ARB + i); - if (TexEnabled[i]) - glEnable(GL_TEXTURE_2D); - else - glDisable(GL_TEXTURE_2D); - printf("Enabled: "); - for (i = 0; i < NumUnits; i++) - printf("%d ", (int) TexEnabled[i]); - printf("\n"); + ToggleUnit(i); } else if (entry==ANIMATE) { Animate = !Animate; + if (Animate) + glutIdleFunc(Idle); + else + glutIdleFunc(NULL); } else if (entry==QUIT) { exit(0); @@ -183,9 +162,36 @@ static void Key( unsigned char key, int x, int y ) (void) x; (void) y; switch (key) { - case 27: - exit(0); - break; + case 'a': + Animate = !Animate; + break; + case '0': + ToggleUnit(0); + break; + case '1': + ToggleUnit(1); + break; + case '2': + ToggleUnit(2); + break; + case '3': + ToggleUnit(3); + break; + case '4': + ToggleUnit(4); + break; + case '5': + ToggleUnit(5); + break; + case '6': + ToggleUnit(6); + break; + case '7': + ToggleUnit(7); + break; + case 27: + exit(0); + break; } glutPostRedisplay(); } @@ -327,7 +333,8 @@ int main( int argc, char *argv[] ) glutKeyboardFunc( Key ); glutSpecialFunc( SpecialKey ); glutDisplayFunc( Display ); - glutIdleFunc( Idle ); + if (Animate) + glutIdleFunc(Idle); glutCreateMenu(ModeMenu); |