X-Git-Url: https://git.ucc.asn.au/?p=atyndall%2Fcits2231.git;a=blobdiff_plain;f=scene.c;h=e5d2a172a92a29f7c790b2897f7de19fe30822bd;hp=31a33f0a3dfcdc6031561f1a735e6afde5135ef7;hb=2a3932dad3ec48310af0b3c3cbb7685fc6105b03;hpb=2639a639e94b0df1b48a84dca12f8d3636c4f3ac diff --git a/scene.c b/scene.c index 31a33f0..e5d2a17 100644 --- a/scene.c +++ b/scene.c @@ -10,6 +10,7 @@ #include #include #include +#include #include "bitmap.h" @@ -118,7 +119,20 @@ static GLfloat floorVertices[4][3] = { static GLfloat lightColor[] = {1.0, 1.0, 1.0, 1.0}; // White light static GLfloat lightPosition[4]; -static float lightAngle = 10.0, lightHeight = 20; + +int moving, startx, starty; +int lightMoving = 0, lightStartX, lightStartY; + +/* Time varying or user-controled variables. */ +static float jump = 0.0; +static float lightAngle = 0.0, lightHeight = 5; +GLfloat angle = -150; /* in degrees */ +GLfloat angle2 = 30; /* in degrees */ + +GLfloat near = -10; +GLfloat far = 10; + +static float zoomFactor = 1.0; /** * Prints out error message when file cannot be read @@ -475,18 +489,18 @@ void makeMenu() { * @param h New height */ void windowReshape(int w, int h) { - GLdouble near = -10.0; - GLdouble far = 10.0; - glViewport(0, 0, (GLsizei) w, (GLsizei) h); glMatrixMode(GL_PROJECTION); glLoadIdentity(); + GLfloat x = 2.0f*(200 + 0.5)/w-1.0; + GLfloat y = 2.0f*(200 + 0.5)/h-1.0; + glTranslatef(-x,-y,0.0f); if (w <= h) - glOrtho(near, far, near*(GLfloat)h/(GLfloat)w, - far*(GLfloat)h/(GLfloat)w, near, far); + glOrtho(zoomFactor*near, zoomFactor*far, zoomFactor*near*(GLfloat)h/(GLfloat)w, + zoomFactor*far*(GLfloat)h/(GLfloat)w, near, far); else - glOrtho(near*(GLfloat)w/(GLfloat)h, - far*(GLfloat)w/(GLfloat)h, near, far, near, far); + glOrtho(zoomFactor*near*(GLfloat)w/(GLfloat)h, + zoomFactor*far*(GLfloat)w/(GLfloat)h, zoomFactor*near, zoomFactor*far, near, far); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } @@ -498,38 +512,105 @@ void windowReshape(int w, int h) { * @param x Mouse x position * @param y Mouse y position */ -void mouse(int btn, int state, int x, int y) { +/*void mouse(int btn, int state, int x, int y) { +}*/ +static void +mouse(int button, int state, int x, int y) +{ + if (button == GLUT_LEFT_BUTTON) { + if (state == GLUT_DOWN) { + moving = 1; + startx = x; + starty = y; + } + if (state == GLUT_UP) { + moving = 0; + } + } + if (button == GLUT_MIDDLE_BUTTON) { + if (state == GLUT_DOWN) { + lightMoving = 1; + lightStartX = x; + lightStartY = y; + } + if (state == GLUT_UP) { + lightMoving = 0; + } + } +} + +static void +motion(int x, int y) +{ + if (moving) { + angle = angle + (x - startx); + angle2 = angle2 + (y - starty); + startx = x; + starty = y; + glutPostRedisplay(); + } + if (lightMoving) { + lightAngle += (x - lightStartX)/40.0; + lightHeight += (lightStartY - y)/20.0; + lightStartX = x; + lightStartY = y; + glutPostRedisplay(); + } +} + +void idle() { + angle = (int)(angle + 10) % 360; + //angle2 = (int)(angle2 + 10) % 360; + printf("Angle 1: %f, Angle 2: %f\n", angle, angle2); + sleep(1); + glutPostRedisplay(); +} + + +int drawFloorRecurse = 5; + +void drawSquare(int recurseLevel, float x1, float y1, float x2, float y2) { + + if ( drawFloorRecurse != recurseLevel ) { + float xm = (x1 + x2) / 2.0; + float ym = (y1 + y2) / 2.0; + int rnew = recurseLevel + 1; + + // Split into four sub-quads + drawSquare(rnew, x1, y1, xm, ym); + drawSquare(rnew, x1, ym, xm, y2); + drawSquare(rnew, xm, ym, x2, y2); + drawSquare(rnew, xm, y1, x2, ym); + + } else { + glBegin(GL_QUADS); + glVertex3f(x1, 0.0, y1); + glVertex3f(x1, 0.0, y2); + glVertex3f(x2, 0.0, y2); + glVertex3f(x2, 0.0, y1); + glEnd(); + } + } /** * Draw a floor. */ void drawFloor() { - 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(); + +drawSquare(0, -100.0, -100.0, 100.0, 100.0); /*if (useTexture) { glDisable(GL_TEXTURE_2D); }*/ - glEnable(GL_LIGHTING); } +/*void drawSquare(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2) { + drawSquare(0, x1, y1, x2, y2); +}*/ + /** * Display function */ @@ -537,11 +618,13 @@ void display() { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glLoadIdentity(); gluLookAt( - 0.0, 0.0, -60.0, /* eye is at (x,y,z) */ + 0.0, 0.0, 10.0, /* eye is at (x,y,z) */ 0.0, 0.0, 0.0, /* center is at (x,y,z) */ 0.0, 1.0, 0.0 /* up is in postivie Y direction */ ); + glRotatef(30.0, 1.0, 0.0, 0.0); + /* Reposition the light source. */ lightPosition[0] = 12*cos(lightAngle); lightPosition[1] = lightHeight; @@ -549,6 +632,10 @@ void display() { lightPosition[3] = 0.0; glPushMatrix(); + /* Perform scene rotations based on user mouse input. */ + + glRotatef(angle, 0.0, 1.0, 0.0); + glLightfv(GL_LIGHT0, GL_POSITION, lightPosition); glEnable(GL_BLEND); @@ -558,9 +645,8 @@ void display() { glPushMatrix(); - //glTranslatef(0.0, 0.0, 0.0); - - glutSolidTeapot(5); // Draw teapot for test + glTranslatef(0.0, 1.0, 0.0); + glutWireTeapot(1); // Draw teapot for test glPopMatrix(); glPushMatrix(); @@ -569,7 +655,7 @@ void display() { /* Draw a yellow ball at the light source. */ glTranslatef(lightPosition[0], lightPosition[1], lightPosition[2]); - glutSolidSphere(1.0, 5, 5); + glutSolidSphere(1.0, 50, 50); glEnable(GL_LIGHTING); glPopMatrix(); @@ -587,17 +673,23 @@ void init() { glLoadIdentity(); gluPerspective( - 60.0, /* field of view in degree */ - 1.0, /* aspect ratio */ - 0.0, /* Z near */ - 900.0 /* Z far */ + 60.0, /* field of view in degree */ + 1.0, /* aspect ratio */ + near, /* Z near */ + far /* Z far */ ); - 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); + +GLfloat diffuse0[] = {1.0, 1.0, 1.0, 1.0}; +GLfloat ambient0[] = {1.0, 1.0, 1.0, 1.0}; +GLfloat specular0[] = {1.0, 1.0, 1.0, 1.0}; +GLfloat light0_pos[] ={ 1.0, 2.0, 3,0, 1.0}; + +glEnable(GL_LIGHT0); +glLightfv(GL_LIGHT0, GL_POSITION, light0_pos); +glLightfv(GL_LIGHT0, GL_AMBIENT, ambient0); +glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse0); +glLightfv(GL_LIGHT0, GL_SPECULAR, specular0); glEnable(GL_LIGHTING); glMatrixMode(GL_MODELVIEW); @@ -636,13 +728,15 @@ int main(int argc, char **argv) { glDepthFunc(GL_LEQUAL); // the type glEnable(GL_CULL_FACE); glEnable(GL_TEXTURE_2D); - glLineWidth(3.0); + glLineWidth(1.0); glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST); glutReshapeFunc(windowReshape); glutDisplayFunc(display); glutMouseFunc(mouse); + glutMotionFunc(motion); + //glutIdleFunc(idle); makeMenu();