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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> #include <GL/glfw3.h>
int main( void ) int main(void)
{ {
int width, height, x; int width, height, x;
double t;
GLFWwindow window; GLFWwindow window;
// Initialise GLFW // Initialise GLFW
if( !glfwInit() ) if (!glfwInit())
{ {
fprintf( stderr, "Failed to initialize GLFW\n" ); fprintf(stderr, "Failed to initialize GLFW\n");
exit( EXIT_FAILURE ); exit(EXIT_FAILURE);
} }
// Open a window and create its OpenGL context // 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) if (!window)
{ {
fprintf( stderr, "Failed to open GLFW window\n" ); fprintf(stderr, "Failed to open GLFW window\n");
exit(EXIT_FAILURE);
glfwTerminate();
exit( EXIT_FAILURE );
} }
// Ensure we can capture the escape key being pressed below // 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) // Enable vertical sync (on cards that support it)
glfwSwapInterval( 1 ); glfwSwapInterval(1);
do do
{ {
t = glfwGetTime(); double t = glfwGetTime();
glfwGetMousePos( window, &x, NULL ); glfwGetMousePos(window, &x, NULL);
// Get window size (may be different than the requested size) // 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 // Special case: avoid division by zero below
height = height > 0 ? height : 1; height = height > 0 ? height : 1;
glViewport( 0, 0, width, height ); glViewport(0, 0, width, height);
// Clear color buffer to black // Clear color buffer to black
glClearColor( 0.0f, 0.0f, 0.0f, 0.0f ); glClearColor(0.f, 0.f, 0.f, 0.f);
glClear( GL_COLOR_BUFFER_BIT ); glClear(GL_COLOR_BUFFER_BIT);
// Select and setup the projection matrix // Select and setup the projection matrix
glMatrixMode( GL_PROJECTION ); glMatrixMode(GL_PROJECTION);
glLoadIdentity(); 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 // Select and setup the modelview matrix
glMatrixMode( GL_MODELVIEW ); glMatrixMode( GL_MODELVIEW );
glLoadIdentity(); glLoadIdentity();
gluLookAt( 0.0f, 1.0f, 0.0f, // Eye-position gluLookAt(0.f, 1.f, 0.f, // Eye-position
0.0f, 20.0f, 0.0f, // View-point 0.f, 20.f, 0.f, // View-point
0.0f, 0.0f, 1.0f ); // Up-vector 0.f, 0.f, 1.f); // Up-vector
// Draw a rotating colorful triangle // Draw a rotating colorful triangle
glTranslatef( 0.0f, 14.0f, 0.0f ); glTranslatef(0.f, 14.f, 0.f);
glRotatef( 0.3f*(GLfloat)x + (GLfloat)t*100.0f, 0.0f, 0.0f, 1.0f ); glRotatef(0.3f * (GLfloat) x + (GLfloat) t * 100.f, 0.f, 0.f, 1.f);
glBegin( GL_TRIANGLES );
glColor3f( 1.0f, 0.0f, 0.0f ); glBegin(GL_TRIANGLES);
glVertex3f( -5.0f, 0.0f, -4.0f ); glColor3f(1.f, 0.f, 0.f);
glColor3f( 0.0f, 1.0f, 0.0f ); glVertex3f(-5.f, 0.f, -4.f);
glVertex3f( 5.0f, 0.0f, -4.0f ); glColor3f(0.f, 1.f, 0.f);
glColor3f( 0.0f, 0.0f, 1.0f ); glVertex3f(5.f, 0.f, -4.f);
glVertex3f( 0.0f, 0.0f, 6.0f ); glColor3f(0.f, 0.f, 1.f);
glVertex3f(0.f, 0.f, 6.f);
glEnd(); glEnd();
// Swap buffers // Swap buffers
@ -84,12 +82,12 @@ int main( void )
glfwPollEvents(); glfwPollEvents();
} // Check if the ESC key was pressed or the window was closed } // Check if the ESC key was pressed or the window was closed
while( glfwIsWindow(window) && while (glfwIsWindow(window) &&
glfwGetKey( window, GLFW_KEY_ESC ) != GLFW_PRESS ); glfwGetKey(window, GLFW_KEY_ESC) != GLFW_PRESS);
// Close OpenGL window and terminate GLFW // Close OpenGL window and terminate GLFW
glfwTerminate(); glfwTerminate();
exit( EXIT_SUCCESS ); exit(EXIT_SUCCESS);
} }