//----------------------------------------------------
bool guiQuad::selectPoint(float x, float y, float offsetX, float offsetY, float width, float height, float hitArea){
//make sure selected is -1 unless we really find a point
selected = -1;
if(width == 0 || height == 0 || x < offsetX || x > offsetX + width || y < offsetY || y > offsetY + height){
//then we are out of our possible quad area
//so we ignore :)
return false;
}
//lets get it in range x(0 - width) y(0 - height)
float px = x - offsetX;
float py = y - offsetY;
//now get in 0-1 range
px /= width;
py /= height;
hitArea /= width;
//we want to store the smallest distance found
//because in the case when two points are in the
//hit area we want to pick the closet
float storeDist = 9999999.0;
for(int i = 0; i < 4; i++){
float dx = floatAbs(px - srcZeroToOne[i].x);
float dy = floatAbs(py - srcZeroToOne[i].y);
float dist = sqrt(dx*dx + dy*dy);
if(dist > hitArea)continue;
if(dist < storeDist){
selected = i;
storeDist = dist;
}
}
if(selected != -1){
srcZeroToOne[selected].x = px;
srcZeroToOne[selected].y = py;
srcScaled[selected].x = px;
srcScaled[selected].y = py;
if(selected == 0)setCommonText("status: Quad - Top Left");
else
if(selected == 1)setCommonText("status: Quad - Top Right");
else
if(selected == 2)setCommonText("status: Quad - Bottom Right");
else
if(selected == 3)setCommonText("status: Quad - Bottom Left");
return true;
}
return false;
}
//-----------------------------------
bool drip::update(){
if(!isDripping())return false;
//lets figure out how far we will have travelled
distance += floatAbs(vel.x) + floatAbs(vel.y);
//only update pos if doing so would keep us
//under the dripLength - otherwise we could
//go outside of the image dimensions
//printf("dist is %f - length is %i \n", distance, dripLength);
if(distance >= dripLength){
stopDripping();
return false;
}else{
//lets see if we have moved less than 1 pixel
float preDist = floatAbs( (pre - pos).length() );
//if(preDist > 1){
//update our previous point
pre = pos;
//}
//some deceleration
if( dripLength - distance < 24) {
vel.x *= 0.987;
vel.y *= 0.987;
if( floatAbs(vel.x) < 0.01 && floatAbs(vel.y) < 0.01){
stopDripping();
return false;
}
}
//update our current point
pos.x += vel.x;
pos.y += vel.y;
//printf("pos is %f %f - vel is %f %f \n", pos.x, pos.y, vel.x, vel.y);
//if we have moved less than a pixel
//then no need to draw
//if(preDist < 1){
// return false;
//}
}
return true;
}
//-----------------------------------
bool drip::setup(float x, float y, int imageW, int imageH, int _direction, float length, float speed, int dWidth){
//set position
pos.x = x;
pos.y = y;
//lets make sure it lies in the image
if(pos.x < 0)pos.x = 0;
else if(pos.x >= imageW)pos.x = imageW -1;
if(pos.y < 0)pos.y = 0;
else if(pos.y >= imageH)pos.y = imageH -1;
//set pre to be the same as position
pre = pos;
//make sure we have only 4 directions
direction = _direction;
if(direction < 0) direction = 0;
if(direction > 3) direction = 3;
//figure out target and
//acceleration based on direction
if(direction == 0){ //south
dst.x = pos.x;
dst.y = pos.y + length;
vel.x = 0;
vel.y = speed;
}
else
if(direction == 1){ //west
dst.x = pos.x - length;
dst.y = pos.y;
vel.x = -speed;
vel.y = 0; }
else
if(direction == 2){ //north
dst.x = pos.x;
dst.y = pos.y - length;
vel.x = 0;
vel.y = -speed;
}
else
if(direction == 3){ //east
dst.x = pos.x + length;
dst.y = pos.y;
vel.x = speed;
vel.y = 0;
}
//now lets check we haven't gone over our image border
if(dst.x >= imageW){
dst.x = imageW - 1;
}
else if(dst.x < 0){
dst.x = 0;
}
if(dst.y >= imageH){
dst.y = imageH - 1;
}
else if(dst.y < 0){
dst.y = 0;
}
//recalculate the dripLength
dripLength = floatAbs(dst.x - pos.x) + floatAbs(dst.y - pos.y);
//lets not start dripping until specifically told to do so
dripping = false;
//store our drip width
dripWidth = dWidth;
return true;
}