Unity3d head name and blood strip update and drawing

Using unityengine; using system. collections; public class NPC: monobehaviour {// main camera object private camera; // NPC name private string name = "I am Yu Song Momo"; // The main object gameobject hero; // float npcheight of the NPC model height; // red blood strip map public texture2d blood_red; // public texture2d blood_black; // default NPC blood value private int HP = 100; void start () {// obtain the principal object hero = gameobject Based on the tag. findgameobjectwithtag ("Player"); // obtain the camera pair Like camera = camera. main; // annotation 1 // get the original height of the model float size_y = collider. bounds. size. y; // get the scaling ratio float scal_y = transform. localscale. y; // their product is the height of npcheight = (size_y * scal_y);} void Update () {// keep the NPC always facing the main character transform. lookat (hero. transform);} void ongui () {// get the coordinates of the NPC head in the 3D world. // by default, the NPC coordinate points are under the soles of the feet, so we can add the height of the npcheight model to vector3 worldposition = new vector3 (transform. position. x, transform. position. Y + NP Cheight, transform. position. z); // convert the 3D coordinates on the head of the NPC to the coordinates vector2 position = camera in the 2D screen. worldtoscreenpoint (worldposition); // obtain the 2D Coordinate Position = new vector2 (position. x, screen. height-position. y); // annotation 2 // calculate the width and height of the bleeding strip vector2 bloodsize = GUI. skin. label. calcsize (New guicontent (blood_red); // calculate the red blood bar display area using the blood value int blood_width = blood_red.width * HP/100; // draw the black blood bar GUI first. drawtexture (New rect (position. X -(Bloodsize. x/2), position. y-bloodsize. y, bloodsize. x, bloodsize. y), blood_black); // draw the red blood bar GUI. drawtexture (New rect (position. x-(bloodsize. x/2), position. y-bloodsize. y, blood_width, bloodsize. y), blood_red); // annotation 3 // calculate the width and height of the NPC name vector2 namesize = GUI. skin. label. calcsize (New guicontent (name); // set the display color to yellow GUI. color = color. yellow; // draw the NPC name GUI. label (New rect (position. x-(namesize. x/2), position. Y-namesize. y-bloodsize. y, namesize. x, namesize. y), name) ;}// The following is the event of the classic Mouse clicking object. You should know what it means. Void onmousedrag () {debug. log ("when you drag the model area");} void onmousedown () {debug. log ("when the mouse is pressed"); If (HP> 0) {HP-= 5 ;}} void onmouseup () {debug. log ("when the mouse is lifted");} void onmouseenter () {debug. log ("when the mouse enters the object area");} void onmouseexit () {debug. log ("when the mouse leaves the model area");} void onmouseover () {debug. log ("when the mouse stays in this object area ");}}