void myDisplay(void)
{
// 清除。GL_COLOR_BUFFER_BIT表示清除颜色
/*
在RGB模式下，使用glClearColor来指定“空”的颜色，它需要四个参数，其参数的意义跟glColor4f相似。
在索引颜色模式下，使用glClearIndex来指定“空”的颜色所在的索引，它需要一个参数，其意义跟glIndexi相似。
*/
glClearColor(0.5f, 0.5f, 0.5f, 0.5f);
glClear(GL_COLOR_BUFFER_BIT);
drawrect();
drawpoint();
drawline();
drawpolygon();
draw5star();
drawsin();
drawtriangle();
//保证前面的OpenGL命令立即执行（而不是让它们在缓冲区中等待）。其作用跟fflush(stdout)类似。
glFlush();
}
int
drawsprite(struct render_buffer *rb, struct sprite *s, struct sprite_trans * ts) {
struct sprite_trans temp;
struct matrix temp_matrix;
struct sprite_trans *t = sprite_trans_mul(&s->t, ts, &temp, &temp_matrix);
switch (s->type) {
case TYPE_PICTURE:
return drawquad(rb, s->s.pic, t);
case TYPE_POLYGON:
return drawpolygon(rb, s->s.poly, t);
case TYPE_ANIMATION: {
struct pack_animation *ani = s->s.ani;
int frame = s->frame % s->total_frame;
if (frame < 0) {
frame += s->total_frame;
}
frame += s->start_frame;
struct pack_frame * pf = OFFSET_TO_POINTER(struct pack_frame, s->pack, ani->frame);
pf = &pf[frame];
int i;
for (i=0; i<pf->n; i++) {
struct pack_part *pp = OFFSET_TO_POINTER(struct pack_part, s->pack, pf->part);
pp = &pp[i];
int index = pp->component_id;
struct sprite * child = s->data.children[index];
if (child == NULL || (child->flags & SPRFLAG_INVISIBLE)) {
continue;
}
struct sprite_trans temp2;
struct matrix temp_matrix2;
struct sprite_trans *ct = sprite_trans_mul2(s->pack, &pp->t, t, &temp2, &temp_matrix2);
int r = drawsprite(rb, child, ct);
if (r)
return r;
}
return 0;
}
case TYPE_LABEL:
if (s->data.rich_text) {
// don't support draw label to renderbuffer
return -1;
}
return 0;
case TYPE_ANCHOR:
if (s->data.anchor->ps) {
return -1;
}
anchor_update(s, t);
return 0;
case TYPE_PANNEL:
if (s->data.scissor) {
return -1;
} else {
return 0;
}
}
return -1;
}
void TerosCam::drawobject (TerosObject obj)
{
for (int i = 0; i < obj.sidenum (); i++)
{
TerosPolygon * temp = obj.putside (i);
drawpolygon(*temp, obj);
}
}
