OpenHarmony/third_party_mesa3d
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better front-plane clip test

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This commit is contained in:
Brian
2007-11-30 09:07:39 -07:00
parent a11b6f025c
commit 44c8dac0af
1 changed files with 28 additions and 15 deletions
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43
progs/trivial/quad-clip-nearplane.c
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@@ -33,6 +33,7 @@
GLenum doubleBuffer; GLenum doubleBuffer;
float Z = -6;
static void Init(void) static void Init(void)
{ {
@@ -40,30 +41,36 @@ static void Init(void)
fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION)); fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR)); fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
glClearColor(0.0, 0.0, 1.0, 0.0); fprintf(stderr, "Press z/Z to translate quad\n");
glClearColor(0.0, 0.0, 1.0, 0.0);
} }
static void Reshape(int width, int height) static void Reshape(int width, int height)
{ {
glViewport(0, 0, (GLint)width, (GLint)height); glViewport(0, 0, (GLint)width, (GLint)height);
glMatrixMode(GL_PROJECTION); glMatrixMode(GL_PROJECTION);
glLoadIdentity(); glLoadIdentity();
glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); glFrustum(-1.0, 1.0, -1.0, 1.0, 5, 100.0);
glMatrixMode(GL_MODELVIEW); glMatrixMode(GL_MODELVIEW);
} }
static void Key(unsigned char key, int x, int y) static void Key(unsigned char key, int x, int y)
{ {
switch (key) { switch (key) {
case 27: case 'z':
exit(1); Z += 0.5;
default: break;
return; case 'Z':
Z -= 0.5;
break;
case 27:
exit(1);
default:
return;
} }
printf("Z = %f\n", Z);
glutPostRedisplay(); glutPostRedisplay();
} }
@@ -71,17 +78,22 @@ static void Draw(void)
{ {
glClear(GL_COLOR_BUFFER_BIT); glClear(GL_COLOR_BUFFER_BIT);
glPushMatrix();
glTranslatef(0, -0.5, Z);
glBegin(GL_QUADS); glBegin(GL_QUADS);
glColor3f(1,0,0); glColor3f(1,0,0);
glVertex3f( 0.9, -0.9, 30.0); glVertex3f( -0.8, 0, -4.0);
glColor3f(1,1,0); glColor3f(1,1,0);
glVertex3f( 0.9, 0.9, 30.0); glVertex3f( 0.8, 0, -4.0);
glColor3f(1,0,1); glColor3f(1,0,1);
glVertex3f(-1.9, 0.9, 30.0); glVertex3f( 0.8, 0, 4.0);
glColor3f(0,1,1); glColor3f(0,1,1);
glVertex3f(-1.9, -0.9, -30.0); glVertex3f( -0.8, 0, 4.0);
glEnd(); glEnd();
glPopMatrix();
glFlush(); glFlush();
if (doubleBuffer) { if (doubleBuffer) {
@@ -118,7 +130,8 @@ int main(int argc, char **argv)
exit(1); exit(1);
} }
glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250); glutInitWindowPosition(0, 0);
glutInitWindowSize( 250, 250);
type = GLUT_RGB; type = GLUT_RGB;
type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
@@ -134,5 +147,5 @@ int main(int argc, char **argv)
glutKeyboardFunc(Key); glutKeyboardFunc(Key);
glutDisplayFunc(Draw); glutDisplayFunc(Draw);
glutMainLoop(); glutMainLoop();
return 0; return 0;
} }