/*
* Draws the plant.
*/
void drawPlant(int i,float scale,float radscale,int string)
{
char *ptr = lsystem[string];
char ch[] = { '\0','\0' };
GLfloat c1[] = { 0.6549f,0.4901f,0.2392f }; /* light brown */
GLfloat c2[] = { 0.3607f,0.2510f,0.2000f }; /* dark brown */
GLfloat c3[] = { 0.1373f,0.5568f,0.1373f }; /* forest green */
if(i==0)
return;
PushMatrix();
while(*ptr != '\0')
{
switch(*ptr)
{
case 'F':
Rotate(tilt/10000,0.0,0.0,1.0); /* tilt very very slightly */
LoadMatrix();
if(do_growth && floor(growth)==i)
{
draw_branch(LENGTH*scale*(growth-1),RADIUS*radscale,BASE_TRI,c1,c2);
Translate(0.0,LENGTH*scale*(growth-1),0.0);
}
else
{
draw_branch(LENGTH*scale,RADIUS*radscale,BASE_TRI,c1,c2);
Translate(0.0,LENGTH*scale,0.0);
}
break;
case '[':
PushMatrix();
break;
case ']':
PopMatrix();
break;
case 'L':
if(do_growth && floor(growth)==i)
draw_leaf(4*(growth-1)*scale,1*(growth-1)*scale,25,c3);
else
draw_leaf(4*scale,1*scale,25,c3);
break;
case 'R':
Rotate(yrotate,0.0,1.0,0.0);
break;
case 'T':
Rotate(tilt,0.0,0.0,1.0);
break;
default:
if(isdigit(*ptr))
{
ch[0] = *ptr;
drawPlant(i-1,scale*SCALE,radscale*RADSCALE,atoi(ch));
}
break;
}
ptr++;
}
PopMatrix();
}
void display() {
glClear(GL_COLOR_BUFFER_BIT);
/* put plant drawing code here */
drawPlant();
/* end drawing code */
glFlush();
}
void display(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // „Ƕ„Ç£„É≥„Éâ„Ƕ„ÅÆËÉåÊôØ„Çí°ó„Çä„ŧ„Å∂„Å? & Èö†Èù¢Âá¶ÁêÅEÇíÂèØËÉΩ„Å´„Åô„Çã
glEnable(GL_DEPTH_TEST); // Èö†Èù¢Âá¶ÁêÅEñãÂß?
glEnable(GL_NORMALIZE);
glEnable(GL_LIGHTING);
glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
glPushMatrix();
glTranslatef(0.0, 1.0, 0.0);
polarview(); // „Éù„ÅE„É©„ɺ„Éì„É•„ɺ„Å∏„ÅÆ„Éì„É•„ɺ„ǧ„É≥„Ç∞§âÊèõ
glPushMatrix();
glLightfv(GL_LIGHT0, GL_POSITION, light0);
glPopMatrix();
shading(5);
drawGround2D();
shading(6);
glDisable(GL_LIGHTING);
drawGrass();
glEnable(GL_LIGHTING);
shading(5);
drawPlant();
if (rainFlag == GL_TRUE)
drawRain();
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
drawCloud();
if (thunderFlag == GL_TRUE && rainFlag == GL_TRUE) {
if (lightningnum == 0 || lightningnum == 4)
lightning();
lightningnum++;
if (lightningnum == 5) {
lightningnum = 0;
thunderFlag = GL_FALSE;
}
if (rand() % 10 == 4)
fallFlag = GL_TRUE;
}
else thunderFlag = GL_FALSE;
glPopMatrix();
glutSwapBuffers();
}
// Draw the leaf
void drawPlant(int i, GLfloat t[]) {
GLfloat temp[9];
GLfloat *pivot;
double rotate_angle;
double r;
if(t == NULL) {
t = Nothing;
}
if(i <= 0) {
drawLeafBezier(t);
} else {
matrix_multiply3_3(ScaleDown, t , temp);
t = temp;
t = drawStem(i, t);
pivot = t;
drawPlant(i - 1, t);
// recurse LEFT branch
// rotate between PI/8 to PI/4
r = (double)rand() / (double)RAND_MAX;
rotate_angle = (M_PI / 8) + r * M_PI / 8;
t = matrix_rotate(t, rotate_angle, true);
drawPlant(i - 1, t);
t = pivot;
// recurse RIGHT branch
r = (double)rand() / (double)RAND_MAX;
rotate_angle = (M_PI / 8) + r * M_PI / 8;
t = matrix_rotate(t, -rotate_angle, true);
drawPlant(i - 1, t);
}
}
void display() {
glEnable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_MAP1_VERTEX_3);
/* See drawplant.c for the definition of this routine */
drawPlant(cur_depth);
glFlush(); /* Flush all executed OpenGL ops finish */
/*
* Since we are using double buffers, we need to call the swap
* function every time we are done drawing.
*/
glutSwapBuffers();
}
void display() {
glEnable(GL_DEPTH_TEST);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Draw Background
int pic_w, pic_h;
GLubyte* img = readPPMfile ("apple.ppm", &pic_w, &pic_h);
glRasterPos3f (-40.0f, -10.0f, -40.0f);
glDrawPixels (pic_w, pic_h, GL_RGB, GL_UNSIGNED_BYTE, img);
/* See drawplant.c for the definition of this routine */
drawPlant(_iterations, 10.0f);
glFlush(); /* Flush all executed OpenGL ops finish */
/*
* Since we are using double buffers, we need to call the swap
* function every time we are done drawing.
*/
glutSwapBuffers();
}