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better texture matrix, better end-cap reflections on cylinder

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This commit is contained in:
Brian Paul 1999-10-26 17:08:31 +00:00
parent 98b607b57d
commit 9a19ccb578
1 changed files with 22 additions and 11 deletions
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33
progs/demos/gloss.c
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@ -1,4 +1,4 @@
/* $Id: gloss.c,v 1.2 1999/10/23 08:12:23 brianp Exp $ */ /* $Id: gloss.c,v 1.3 1999/10/26 17:08:31 brianp Exp $ */
/* /*
* Specular reflection demo. The specular highlight is modulated by * Specular reflection demo. The specular highlight is modulated by
@ -82,14 +82,7 @@ static void Display( void )
glMaterialfv(GL_FRONT, GL_SPECULAR, Black); glMaterialfv(GL_FRONT, GL_SPECULAR, Black);
glEnable(GL_TEXTURE_2D); glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, BaseTexture); glBindTexture(GL_TEXTURE_2D, BaseTexture);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glScalef(2.0, 2.0, 2.0);
glMatrixMode(GL_MODELVIEW);
glCallList(Object); glCallList(Object);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
/* Second pass: specular lighting with reflection texture */ /* Second pass: specular lighting with reflection texture */
glBlendFunc(GL_ONE, GL_ONE); /* add */ glBlendFunc(GL_ONE, GL_ONE); /* add */
@ -237,6 +230,9 @@ static void Init( int argc, char *argv[] )
{ {
static GLfloat height = 100.0; static GLfloat height = 100.0;
static GLfloat radius = 40.0; static GLfloat radius = 40.0;
static GLint slices = 24; /* pie slices around Z axis */
static GLint stacks = 10; /* subdivisions along length of cylinder */
static GLint rings = 4; /* rings in the end disks */
GLUquadricObj *q = gluNewQuadric(); GLUquadricObj *q = gluNewQuadric();
assert(q); assert(q);
gluQuadricTexture(q, GL_TRUE); gluQuadricTexture(q, GL_TRUE);
@ -247,21 +243,36 @@ static void Init( int argc, char *argv[] )
glPushMatrix(); glPushMatrix();
glTranslatef(0.0, 0.0, -0.5 * height); glTranslatef(0.0, 0.0, -0.5 * height);
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glScalef(8.0, 4.0, 2.0);
glMatrixMode(GL_MODELVIEW);
/* cylinder */ /* cylinder */
gluQuadricNormals(q, GL_SMOOTH); gluQuadricNormals(q, GL_SMOOTH);
gluQuadricTexture(q, GL_TRUE); gluQuadricTexture(q, GL_TRUE);
gluCylinder(q, radius, radius, height, 24, 10); gluCylinder(q, radius, radius, height, slices, stacks);
/* end cap */ /* end cap */
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glScalef(3.0, 3.0, 1.0);
glMatrixMode(GL_MODELVIEW);
glTranslatef(0.0, 0.0, height); glTranslatef(0.0, 0.0, height);
gluDisk(q, 0.0, radius, 24, 1); gluDisk(q, 0.0, radius, slices, rings);
/* other end cap */ /* other end cap */
glTranslatef(0.0, 0.0, -height); glTranslatef(0.0, 0.0, -height);
gluQuadricOrientation(q, GLU_INSIDE); gluQuadricOrientation(q, GLU_INSIDE);
gluDisk(q, 0.0, radius, 24, 1); gluDisk(q, 0.0, radius, slices, rings);
glPopMatrix(); glPopMatrix();
glMatrixMode(GL_TEXTURE);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glEndList(); glEndList();
gluDeleteQuadric(q); gluDeleteQuadric(q);
} }