diff options
| author | Brian <[email protected]> | 2007-09-18 12:55:53 -0600 |
|---|---|---|
| committer | Brian <[email protected]> | 2007-09-18 12:56:23 -0600 |
| commit | 6fbbeed690c7f9aa0a97fdf64c8c57d1d79e7c33 (patch) | |
| tree | d03f1776dca777295b46a8fe98618e04e769974f | |
| parent | 2a460f6185199bad8b2bca4d0bac319377f801fa (diff) | |
use perspective projection, press r/R to rotate the quad
| -rw-r--r-- | progs/trivial/quad-tex-2d.c | 25 |
1 files changed, 21 insertions, 4 deletions
diff --git a/progs/trivial/quad-tex-2d.c b/progs/trivial/quad-tex-2d.c index cb0b9202a25..3a6e5237ed5 100644 --- a/progs/trivial/quad-tex-2d.c +++ b/progs/trivial/quad-tex-2d.c @@ -30,6 +30,7 @@ static GLenum Target = GL_TEXTURE_2D; static GLenum Filter = GL_NEAREST; GLenum doubleBuffer; +static float Rot = 0; static void Init(void) { @@ -81,13 +82,24 @@ static void Reshape(int width, int height) glViewport(0, 0, (GLint)width, (GLint)height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); +#if 0 glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); +#else + glFrustum(-1, 1, -1, 1, 10, 20); +#endif glMatrixMode(GL_MODELVIEW); + glTranslatef(0, 0, -15); } static void Key(unsigned char key, int x, int y) { switch (key) { + case 'r': + Rot += 10.0; + break; + case 'R': + Rot -= 10.0; + break; case 27: exit(0); default: @@ -100,17 +112,22 @@ static void Draw(void) { glClear(GL_COLOR_BUFFER_BIT); + glPushMatrix(); + glRotatef(Rot, 0, 1, 0); + glBegin(GL_QUADS); glTexCoord2f(1,0); - glVertex3f( 0.9, -0.9, -30.0); + glVertex3f( 0.9, -0.9, 0.0); glTexCoord2f(1,1); - glVertex3f( 0.9, 0.9, -30.0); + glVertex3f( 0.9, 0.9, 0.0); glTexCoord2f(0,1); - glVertex3f(-0.9, 0.9, -30.0); + glVertex3f(-0.9, 0.9, 0.0); glTexCoord2f(0,0); - glVertex3f(-0.9, -0.9, -30.0); + glVertex3f(-0.9, -0.9, 0.0); glEnd(); + glPopMatrix(); + glFlush(); if (doubleBuffer) { |