X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=scene.c;h=6c9540ae85e4a69cb87c5da9cdc8285d6845c088;hb=59ab0befd5f3d6ea6a2b72aeeb045ab93103995a;hp=a2f1514e6c8314629052eb5dd89e58ebe2c28252;hpb=f459b7ee740cbf5c5e96987b0871261429cae84c;p=atyndall%2Fcits2231.git diff --git a/scene.c b/scene.c index a2f1514..6c9540a 100644 --- a/scene.c +++ b/scene.c @@ -464,21 +464,20 @@ void makeMenu() { * @param h New height */ void windowReshape(int w, int h) { - GLfloat aspect = (GLfloat) h / (GLfloat) w; - GLdouble n = 10.0; + GLdouble near = -10.0; + GLdouble far = 10.0; - glViewport(0, 0, w, h); - - glMatrixMode(GL_PROJECTION); /* switch matrix mode*/ + glViewport(0, 0, (GLsizei) w, (GLsizei) h); + glMatrixMode(GL_PROJECTION); glLoadIdentity(); - - if (w <= h) { - gluOrtho2D(-n, n, -n * aspect, n * aspect); - } else { - gluOrtho2D(-n * aspect, n * aspect, -n, n); - } - - glMatrixMode(GL_MODELVIEW); /* return to modelview mode */ + if (w <= h) + glOrtho(near, far, near*(GLfloat)h/(GLfloat)w, + far*(GLfloat)h/(GLfloat)w, near, far); + else + glOrtho(near*(GLfloat)w/(GLfloat)h, + far*(GLfloat)w/(GLfloat)h, near, far, near, far); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); } /** @@ -492,6 +491,47 @@ void mouse(int btn, int state, int x, int y) { } +static GLfloat floorVertices[4][3] = { + { -20.0, 0.0, 20.0 }, + { 20.0, 0.0, 20.0 }, + { 20.0, 0.0, -20.0 }, + { -20.0, 0.0, -20.0 }, +}; + +/* Draw a floor (possibly textured). */ +static void +drawFloor(void) +{ + glDisable(GL_LIGHTING); + + //if (useTexture) { + // glEnable(GL_TEXTURE_2D); + //} + + glBegin(GL_QUADS); + glTexCoord2f(0.0, 0.0); + glVertex3fv(floorVertices[0]); + glTexCoord2f(0.0, 16.0); + glVertex3fv(floorVertices[1]); + glTexCoord2f(16.0, 16.0); + glVertex3fv(floorVertices[2]); + glTexCoord2f(16.0, 0.0); + glVertex3fv(floorVertices[3]); + glEnd(); + + /*if (useTexture) { + glDisable(GL_TEXTURE_2D); + }*/ + + glEnable(GL_LIGHTING); +} + + +static GLfloat lightColor[] = {0.8, 1.0, 0.8, 1.0}; /* green-tinted */ +static GLfloat lightPosition[4]; +static float lightAngle = 0.0, lightHeight = 20; + + /** * Display function */ @@ -499,17 +539,81 @@ void display() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); + /*glTranslatef( 0.0f, 0.0f, 0.0f); glBegin(GL_QUADS); - glColor3f(1.0f,0.0f,0.0f); // Set The Color To Red - glVertex3f(-1.0f, 1.0f, 0.0f); // Top left - glVertex3f( 1.0f, 1.0f, 0.0f); // Top Right - glVertex3f( 1.0f,-1.0f, 0.0f); // Bottom Right - glVertex3f(-1.0f,-1.0f, 0.0f); // Bottom Left - glEnd(); + glVertex3f( 0.0f, 1.0f, -1.0f); + glVertex3f( 0.0f, 1.0f, 1.0f); + glVertex3f( 0.0f, -1.0f, 1.0f); + glVertex3f( 0.0f, -1.0f, -1.0f); + glEnd();*/ + + + //glTranslatef( 0.0f, 0.0f, -5.0f); // Move into the Screen 10.0 + //glutSolidTeapot(1); + + /* glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + gluLookAt(0.7f, 0.4f, 0.9f, -2.0f, -1.0f, -7.0f, 1.0f, 10.0f, 1.0f); + + + glMatrixMode(GL_PROJECTION); + glLoadIdentity();*/ + + /* Reposition the light source. */ + lightPosition[0] = 12*cos(lightAngle); + lightPosition[1] = lightHeight; + lightPosition[2] = 12*sin(lightAngle); + //if (directionalLight) { + lightPosition[3] = 0.0; + //} else { + // lightPosition[3] = 1.0; + //} + + glPushMatrix(); + + /* Tell GL new light source position. */ + glLightfv(GL_LIGHT0, GL_POSITION, lightPosition); + + /* Draw "bottom" of floor in blue. */ + glFrontFace(GL_CW); /* Switch face orientation. */ + glColor4f(0.1, 0.1, 0.7, 1.0); + drawFloor(); + glFrontFace(GL_CCW); + + /* Draw "top" of floor. Use blending to blend in reflection. */ + glEnable(GL_BLEND); + glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); + glColor4f(0.7, 0.0, 0.0, 0.3); + glColor4f(1.0, 1.0, 1.0, 0.3); + drawFloor(); + glDisable(GL_BLEND); + + glPushMatrix(); + glDisable(GL_LIGHTING); + + /* Draw a yellow ball at the light source. */ + glTranslatef(lightPosition[0], lightPosition[1], lightPosition[2]); + glutSolidSphere(1.0, 5, 5); + + glEnable(GL_LIGHTING); + glPopMatrix(); + + drawFloor(); glutSwapBuffers(); } +/** + * init function, sets OpenGL's starting state + */ +void init() { + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + gluPerspective( 60, 1, 0.1, 1000.0); + glMatrixMode(GL_MODELVIEW); +} + + /** * Main function * @param argc Number of arguments @@ -535,18 +639,37 @@ int main(int argc, char **argv) { glutInitWindowSize(500, 500); glutCreateWindow("Scene Editor"); - glShadeModel(GL_SMOOTH); // Enables Smooth Shading - glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Black Background - glClearDepth(1.0f); // Depth Buffer Setup - glEnable(GL_DEPTH_TEST); // Enables Depth Testing - glDepthFunc(GL_LEQUAL); // The Type Of Depth Test To Do + glShadeModel(GL_SMOOTH); // Enables Smooth Shading + glClearColor(0.0f, 0.0f, 0.0f, 0.0f); // Black Background + glClearDepth(1.0f); // Depth Buffer Setup + glEnable(GL_DEPTH_TEST); // Enables Depth Testing + glDepthFunc(GL_LEQUAL); // the type - glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Really Nice Perspective Calculations + // glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); // Really Nice Perspective Calculations glutReshapeFunc(windowReshape); glutDisplayFunc(display); glutMouseFunc(mouse); makeMenu(); + + init(); + + glMatrixMode(GL_PROJECTION); + gluPerspective( /* field of view in degree */ 40.0, + /* aspect ratio */ 1.0, + /* Z near */ 20.0, /* Z far */ 100.0); + glMatrixMode(GL_MODELVIEW); + gluLookAt(0.0, 8.0, 60.0, /* eye is at (0,8,60) */ + 0.0, 8.0, 0.0, /* center is at (0,8,0) */ + 0.0, 1.0, 0.); /* up is in postivie Y direction */ + + glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, 1); + glLightfv(GL_LIGHT0, GL_DIFFUSE, lightColor); + glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 0.1); + glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.05); + glEnable(GL_LIGHT0); + glEnable(GL_LIGHTING); + glutMainLoop(); }