diff options
Diffstat (limited to 'progs/demos/isosurf.c')
| -rw-r--r-- | progs/demos/isosurf.c | 61 |
1 files changed, 50 insertions, 11 deletions
diff --git a/progs/demos/isosurf.c b/progs/demos/isosurf.c index 9c78a47490..a9d5128c54 100644 --- a/progs/demos/isosurf.c +++ b/progs/demos/isosurf.c @@ -1,4 +1,4 @@ -/* $Id: isosurf.c,v 1.8 2001/01/06 20:38:03 gareth Exp $ */ +/* $Id: isosurf.c,v 1.9 2001/04/19 13:12:40 keithw Exp $ */ /* * Display an isosurface of 3-D wind speed volume. @@ -80,6 +80,7 @@ #define STIPPLE_MASK (STIPPLE|NO_STIPPLE) #define MAXVERTS 10000 +static GLuint maxverts = MAXVERTS; static float data[MAXVERTS][6]; static float compressed_data[MAXVERTS][6]; static GLuint indices[MAXVERTS]; @@ -93,7 +94,7 @@ static GLfloat dist = -6; static GLint state, allowed = ~0; static GLboolean doubleBuffer = GL_TRUE; static GLdouble plane[4] = {1.0, 0.0, -1.0, 0.0}; -static GLuint surf1; +static GLuint surf1, surf2, surf3; static GLboolean PrintInfo = GL_FALSE; @@ -112,7 +113,9 @@ static GLubyte halftone[] = { 0xAA, 0xAA, 0xAA, 0xAA, 0x55, 0x55, 0x55, 0x55}; /* forward decl */ -int BuildList( int mode ); +int BuildVertexList( int mode ); +int BuildArrayEltList( int mode ); +int BuildDrawArraysList( int mode ); static void read_surface( char *filename ) @@ -126,7 +129,7 @@ static void read_surface( char *filename ) } numverts = 0; - while (!feof(f) && numverts<MAXVERTS) { + while (!feof(f) && numverts<maxverts) { fscanf( f, "%f %f %f %f %f %f", &data[numverts][0], &data[numverts][1], &data[numverts][2], &data[numverts][3], &data[numverts][4], &data[numverts][5] ); @@ -391,10 +394,13 @@ static void draw_surface( int with_state ) break; case (DISPLAYLIST|GLVERTEX|STRIPS): - if (!surf1) - surf1 = BuildList( GL_COMPILE_AND_EXECUTE ); - else - glCallList(surf1); + glCallList(surf1); + break; + case (DISPLAYLIST|ARRAY_ELT|STRIPS): + glCallList(surf2); + break; + case (DISPLAYLIST|DRAW_ARRAYS|STRIPS): + glCallList(surf3); break; @@ -468,7 +474,7 @@ static void Display(void) if (doubleBuffer) glutSwapBuffers(); } -int BuildList( int mode ) +int BuildVertexList( int mode ) { int rv = glGenLists(1); glNewList(rv, mode ); @@ -477,6 +483,24 @@ int BuildList( int mode ) return rv; } +int BuildArrayEltList( int mode ) +{ + int rv = glGenLists(1); + glNewList(rv, mode ); + draw_surface( IMMEDIATE|ARRAY_ELT|STRIPS ); + glEndList(); + return rv; +} + +int BuildDrawArraysList( int mode ) +{ + int rv = glGenLists(1); + glNewList(rv, mode ); + draw_surface( IMMEDIATE|DRAW_ARRAYS|STRIPS ); + glEndList(); + return rv; +} + /* KW: only do this when necessary, so CVA can re-use results. */ static void set_matrix( void ) @@ -733,8 +757,6 @@ static void Init(int argc, char *argv[]) compactify_arrays(); make_tri_indices(); - surf1 = BuildList( GL_COMPILE ); - ModeMenu(SHADE_SMOOTH| LIT| NO_TEXTURE| @@ -747,6 +769,10 @@ static void Init(int argc, char *argv[]) NO_STIPPLE| GLVERTEX); + surf1 = BuildVertexList( GL_COMPILE ); + surf2 = BuildArrayEltList( GL_COMPILE ); + surf3 = BuildDrawArraysList( GL_COMPILE ); + if (PrintInfo) { printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); @@ -876,6 +902,15 @@ static GLint Args(int argc, char **argv) else if (strcmp(argv[i], "-info") == 0) { PrintInfo = GL_TRUE; } + else if (strcmp(argv[i], "-10") == 0) { + maxverts = 10; + } + else if (strcmp(argv[i], "-100") == 0) { + maxverts = 100; + } + else if (strcmp(argv[i], "-1000") == 0) { + maxverts = 1000; + } else { printf("%s (Bad option).\n", argv[i]); return QUIT; @@ -952,6 +987,10 @@ int main(int argc, char **argv) glutAddMenuEntry("", 0); glutAddMenuEntry("glVertex display list (STRIPS)", DISPLAYLIST|GLVERTEX|STRIPS); + glutAddMenuEntry("glArrayElement display list (STRIPS)", + DISPLAYLIST|GLVERTEX|STRIPS); + glutAddMenuEntry("glDrawArrays display list (STRIPS)", + DISPLAYLIST|GLVERTEX|STRIPS); glutAddMenuEntry("", 0); if (allowed & DRAW_ARRAYS) { glutAddMenuEntry("DrawElements (TRIANGLES)", |