void SG_EXPORT sgTrailDraw(SGTrail* trail)
{
if(trail == NULL)
return;
if((trail->numpoints != 0) && ((trail->xpoints[0] != trail->xpoints[0]) || (trail->ypoints[0] != trail->ypoints[0])))
sgTrailPopPoint(trail);
if(trail->numpoints == 0)
return;
SGuint i;
float sumlen = 0.0;
float curlen = 0.0;
float px = trail->xpoints[0];
float py = trail->ypoints[0];
float x;
float y;
for(i = 0; i < trail->numpoints; i++)
{
x = trail->xpoints[i];
y = trail->ypoints[i];
if((x != x) || (y != y))
continue;
sumlen += sqrt((px - x) * (px - x) + (py - y) * (py - y));
px = x;
py = y;
}
sgDrawBegin(SG_LINE_STRIP);
px = trail->xpoints[0];
py = trail->ypoints[0];
for(i = 0; i < trail->numpoints; i++)
{
x = trail->xpoints[i];
y = trail->ypoints[i];
if((x != x) || (y != y))
{
sgDrawEnd();
sgDrawBegin(SG_LINE_STRIP);
continue;
}
sgDrawColor2f(1.0, i / (float)(trail->numpoints - 1));
sgDrawVertex2f(x, y);
curlen += sqrt((px - x) * (px - x) + (py - y) * (py - y));
px = x;
py = y;
}
sgDrawEnd();
}
void SG_CALL sgAtlasAreaDrawRads3f2f2f1f(SGAtlas* atlas, SGAtlasArea* area, float x, float y, float z, float xscale, float yscale, float xoffset, float yoffset, float angle)
{
float s0, t0, s1, t1;
sgAtlasGetTexCoordsA(atlas, area, &s0, &t0, &s1, &t1);
// offset -> scale -> rotate -> translate
SGVec2 pos = sgVec2f(x, y);
SGVec2 p0, p1, p2, p3;
p0 = sgVec2f(-xoffset , -yoffset );
p1 = sgVec2f(-xoffset , -yoffset + area->h * yscale);
p2 = sgVec2f(-xoffset + area->w * xscale, -yoffset + area->h * yscale);
p3 = sgVec2f(-xoffset + area->w * xscale, -yoffset );
p0 = sgVec2RotateRads(p0, sgVec2AngleRads(p0) + angle);
p1 = sgVec2RotateRads(p1, sgVec2AngleRads(p1) + angle);
p2 = sgVec2RotateRads(p2, sgVec2AngleRads(p2) + angle);
p3 = sgVec2RotateRads(p3, sgVec2AngleRads(p3) + angle);
p0 = sgVec2Add(p0, pos);
p1 = sgVec2Add(p1, pos);
p2 = sgVec2Add(p2, pos);
p3 = sgVec2Add(p3, pos);
sgDrawBeginT(SG_QUADS, sgAtlasGetTextureA(atlas, area));
sgDrawTexCoord2f(s0, t0);
sgDrawVertex3f(p0.x, p0.y, z);
sgDrawTexCoord2f(s0, t1);
sgDrawVertex3f(p1.x, p1.y, z);
sgDrawTexCoord2f(s1, t1);
sgDrawVertex3f(p2.x, p3.y, z);
sgDrawTexCoord2f(s1, t0);
sgDrawVertex3f(p2.x, p3.y, z);
sgDrawEnd();
}
void SG_EXPORT sgMaskDrawDBG(SGMask* mask, SGint x, SGint y, SGbool transparent)
{
if(mask == NULL)
return;
SGuint i, j;
sgDrawBegin(SG_POINTS);
for(i = 0; i < mask->width; i++)
{
for(j = 0; j < mask->height; j++)
{
if(!transparent)
sgDrawColor1f(mask->field[i][j] ? 1.0 : 0.0);
if(mask->field[i][j] || !transparent)
sgDrawVertex2f(x - mask->xoffset + i, y - mask->yoffset + j);
}
}
sgDrawEnd();
}
void drawPath(SGList* path, SGColor color, SGbool lines, SGbool fill)
{
if(!path)
return;
SGListNode* node;
SGNavGridData* data;
if(lines)
sgDrawBegin(SG_LINE_STRIP);
sgDrawColor4fv(&color.r);
for(node = path->head; node; node = node->next)
{
data = node->item;
if(lines)
sgDrawVertex2f(data->x * cellw + cellw/2, data->y * cellh + cellh/2);
else
sgDrawRectangleWH(data->x * cellw, data->y * cellh, cellw, cellh, fill);
}
if(lines)
sgDrawEnd();
}