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This commit is contained in:
Camilla Berglund 2010-10-24 15:02:59 +02:00
parent 8f78d5df3a
commit dfe67935cf
1 changed files with 33 additions and 35 deletions
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68
examples/triangle.c
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@ -9,74 +9,72 @@
#include <GL/glfw3.h>
int main( void )
int main(void)
{
int width, height, x;
double t;
GLFWwindow window;
// Initialise GLFW
if( !glfwInit() )
if (!glfwInit())
{
fprintf( stderr, "Failed to initialize GLFW\n" );
exit( EXIT_FAILURE );
fprintf(stderr, "Failed to initialize GLFW\n");
exit(EXIT_FAILURE);
}
// Open a window and create its OpenGL context
window = glfwOpenWindow( 640, 480, GLFW_WINDOWED, "Spinning Triangle", NULL );
window = glfwOpenWindow(640, 480, GLFW_WINDOWED, "Spinning Triangle", NULL);
if (!window)
{
fprintf( stderr, "Failed to open GLFW window\n" );
glfwTerminate();
exit( EXIT_FAILURE );
fprintf(stderr, "Failed to open GLFW window\n");
exit(EXIT_FAILURE);
}
// Ensure we can capture the escape key being pressed below
glfwEnable( window, GLFW_STICKY_KEYS );
glfwEnable(window, GLFW_STICKY_KEYS);
// Enable vertical sync (on cards that support it)
glfwSwapInterval( 1 );
glfwSwapInterval(1);
do
{
t = glfwGetTime();
glfwGetMousePos( window, &x, NULL );
double t = glfwGetTime();
glfwGetMousePos(window, &x, NULL);
// Get window size (may be different than the requested size)
glfwGetWindowSize( window, &width, &height );
glfwGetWindowSize(window, &width, &height);
// Special case: avoid division by zero below
height = height > 0 ? height : 1;
glViewport( 0, 0, width, height );
glViewport(0, 0, width, height);
// Clear color buffer to black
glClearColor( 0.0f, 0.0f, 0.0f, 0.0f );
glClear( GL_COLOR_BUFFER_BIT );
glClearColor(0.f, 0.f, 0.f, 0.f);
glClear(GL_COLOR_BUFFER_BIT);
// Select and setup the projection matrix
glMatrixMode( GL_PROJECTION );
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective( 65.0f, (GLfloat)width/(GLfloat)height, 1.0f, 100.0f );
gluPerspective(65.0f, (GLfloat)width/(GLfloat)height, 1.f, 100.0f);
// Select and setup the modelview matrix
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
gluLookAt( 0.0f, 1.0f, 0.0f, // Eye-position
0.0f, 20.0f, 0.0f, // View-point
0.0f, 0.0f, 1.0f ); // Up-vector
gluLookAt(0.f, 1.f, 0.f, // Eye-position
0.f, 20.f, 0.f, // View-point
0.f, 0.f, 1.f); // Up-vector
// Draw a rotating colorful triangle
glTranslatef( 0.0f, 14.0f, 0.0f );
glRotatef( 0.3f*(GLfloat)x + (GLfloat)t*100.0f, 0.0f, 0.0f, 1.0f );
glBegin( GL_TRIANGLES );
glColor3f( 1.0f, 0.0f, 0.0f );
glVertex3f( -5.0f, 0.0f, -4.0f );
glColor3f( 0.0f, 1.0f, 0.0f );
glVertex3f( 5.0f, 0.0f, -4.0f );
glColor3f( 0.0f, 0.0f, 1.0f );
glVertex3f( 0.0f, 0.0f, 6.0f );
glTranslatef(0.f, 14.f, 0.f);
glRotatef(0.3f * (GLfloat) x + (GLfloat) t * 100.f, 0.f, 0.f, 1.f);
glBegin(GL_TRIANGLES);
glColor3f(1.f, 0.f, 0.f);
glVertex3f(-5.f, 0.f, -4.f);
glColor3f(0.f, 1.f, 0.f);
glVertex3f(5.f, 0.f, -4.f);
glColor3f(0.f, 0.f, 1.f);
glVertex3f(0.f, 0.f, 6.f);
glEnd();
// Swap buffers
@ -84,12 +82,12 @@ int main( void )
glfwPollEvents();
} // Check if the ESC key was pressed or the window was closed
while( glfwIsWindow(window) &&
glfwGetKey( window, GLFW_KEY_ESC ) != GLFW_PRESS );
while (glfwIsWindow(window) &&
glfwGetKey(window, GLFW_KEY_ESC) != GLFW_PRESS);
// Close OpenGL window and terminate GLFW
glfwTerminate();
exit( EXIT_SUCCESS );
exit(EXIT_SUCCESS);
}