Unity3d Graphics Bar in the scene of the circle

??

Sun Guangdong: 2015-2-6/2:28 reprint Please specify the Source: http://blog.csdn.net/u010019717

More full content Please see my game Bull address: http://www.unitymanual.com/space-uid-18602.html

First look at the effect:

The difference is a 2d a 3d.

2d is not introduced, relatively simple, for the 3d content, we first look at a mathematical question and answer, so it is easy to understand the program.

That would be a good thing! Just look at the following script.

Using unityengine;using system.collections;using Sunguangdong.math; [Executeineditmode]public class Drawcirclemono:monobehaviour {private Vector3 m_normal;//Use this for INITIALIZATIONVO ID Start () {m_normal = new Vector3 (0, 1, 0);} void Ondrawgizmos () {circle2d circle2 = new Circle2d (transform.position, 5);D rawcircle (ref circle2, color.red); Vector3 Center = new Vector3 (transform.position.x, TRANSFORM.POSITION.Y + 0.2f, transform.position.z); Circle3d circle3 = new Circle3d (ref Center,ref M_normal, 5);D rawcircle (Circle3, color.red, 40);} protected void drawcircle (ref circle2d circle, color color) {int count = 40;float Delta = 2f * MATHF.PI/COUNT; Vector3 prev = circle. Eval (0); Color tempcolor = Gizmos.color; Gizmos.color = color;for (int i = 1; I <= count; ++i) {Vector3 Curr = circle. Eval (i * delta); Gizmos.drawline (prev, curr);p rev = Curr;} Gizmos.color = Tempcolor;} protected void Drawcircle (Vector2 center, float radius, color color) {Circle2d circle = new Circle2d (ref center, RADIUS);int count = 40;float Delta = 2f * MATHF.PI/COUNT; Vector3 prev = circle. Eval (0); Color tempcolor = Gizmos.color; Gizmos.color = color;for (int i = 1; I <= count; ++i) {Vector3 Curr = circle. Eval (i * delta); Gizmos.drawline (prev, curr);p rev = Curr;} Gizmos.color = Tempcolor;} protected void Drawcircle (Circle3d circle, color color, int count =) {Float Delta = 2f * MATHF.PI/COUNT; Vector3 prev = circle. Eval (0); Color tempcolor = Gizmos.color; Gizmos.color = color;for (int i = 1; I <= count; ++i) {Vector3 Curr = circle. Eval (i * delta); Gizmos.drawline (prev, curr);p rev = Curr;} Gizmos.color = Tempcolor;}}

The above script is attached to any object in the scene, such as Cube

namespace sunguangdong.math{using System;    Using System.Collections.Generic;    Using System.Runtime.InteropServices;    Using Unityengine;        [StructLayout (layoutkind.sequential)] public struct Circle2d {public Vector2 Center;        public float Radius; Public circle2d (ref Vector2 Center, float radius) {this.            Center = center; This.        radius = radius; } Public circle2d (Vector2 Center, float radius) {this.            Center = center; This.        radius = radius; public float Calcperimeter () {return (6.283185f *).        Radius); } public float CalcArea () {return (3.141593f * this. Radius) * this.        Radius); Public Vector2 Eval (float t) {return new Vector2 (this. Center.x + (this. Radius * Mathf.cos (t)), this. Center.y + (this.        Radius * Mathf.sin (t)));  } public Vector2 Eval (float T, float radius) {          return new Vector2 (this. Center.x + (RADIUS * Mathf.cos (t)), this.        CENTER.Y + (RADIUS * Mathf.sin (t))); The public bool Contains (ref Vector2 point) {Vector2 vector = point-this. Center;return (Vector.magnitude <= (this. Radius * this.        Radius)); The public bool Contains (Vector2 point) {Vector2 vector = point-this. Center;return (Vector.magnitude <= (this. Radius * this.        Radius)); The public void Include (ref circle2d circle) {Vector2 vector = circle. Center-this.            Center;float num = vector.magnitude; float num2 = circle. Radius-this.            Radius;            float num3 = num2 * NUM2;                if (num3 >= num) {if (num2 >= 0f) {this = circle;                }} else {float NUM4 = mathf.sqrt (num);                if (Num4 > 1e-05f) {    float NUM5 = (num4 + num2)/(2f * num4); This.                Center + = (VECTOR2) (NUM5 * vector); } this. Radius = 0.5f * ((NUM4 + this. Radius) + circle.            Radius); }} public void Include (Circle2d circle) {this.        Include (ref circle); }    }}

namespace sunguangdong.math{using System;    Using System.Runtime.InteropServices;    Using Unityengine;        [StructLayout (layoutkind.sequential)] public struct Circle3d {public Vector3 Center;        Public Vector3 Axis0;        Public Vector3 Axis1;        Public Vector3 Normal;        public float Radius; Public Circle3d (ref Vector3 Center, ref Vector3 Normal, float radius) {this.            Center = center; This.            normal = normal; Vector3ex.createorthonormalbasis (out). Axis0, out of this. AXIS1, ref this.            Normal); This.        radius = radius; } Public Circle3d (Vector3 Center, Vector3 Normal, float radius) {this.            Center = center; This.            normal = normal; Vector3ex.createorthonormalbasis (out). Axis0, out of this. AXIS1, ref this.            Normal); This.        radius = radius; public float Calcperimeter () {return (6.283185f *).        Radius);       } public float CalcArea () {return (3.141593f * this. Radius) * this.        Radius); Public Vector3 Eval (float t) {return (this. Center + ((Vector3) (this. Radius * ((Mathf.cos (t) * this. AXIS0) + (Mathf.sin (t) * this.        AXIS1))); Public Vector3 Eval (float T, float radius) {return (this. Center + ((VECTOR3) (RADIUS * (Mathf.cos (t) * this. AXIS0) + (Mathf.sin (t) * this.        AXIS1))); }    }}

namespace sunguangdong.math{using System;    Using System.Collections.Generic;    Using System.Runtime.CompilerServices;    Using System.Runtime.InteropServices;    Using Unityengine;        public static class Vector3ex {public static readonly Vector3 Zero = new Vector3 (0f, 0f, 0f); public static void Createorthonormalbasis (out Vector3 u, out Vector3 V, ref Vector3 W) {if (Mathf.abs (w                . x) >= Mathf.abs (w.y)) {Float num = mathfex.invsqrt ((w.x * w.x) + (W.Z * w.z));                u.x =-w.z * NUM;                U.y = 0f;                U.Z = w.x * NUM;                v.x = W.y * U.Z;                V.Y = (W.Z * u.x)-(w.x * u.z);            v.z =-w.y * u.x;                } else {Float num2 = mathfex.invsqrt ((W.Y * w.y) + (W.Z * w.z));                u.x = 0f;                U.Y = w.z * NUM2;                u.z =-w.y * NUM2;         v.x = (W.Y * u.z)-(W.Z * u.y);       V.Y =-w.x * U.Z;            v.z = w.x * U.Y; }        }}}

namespace sunguangdong.math{    using System;    Using System.Runtime.InteropServices;    Using Unityengine;    public static class Mathfex    {public        const float Pi = 3.141593f;        public static float invsqrt (float value)        {            if (value! = 0f)            {                return (1f/mathf.sqrt (value));            }            return 0f;}}    }

Finally, attach some other pictures.

Unity3d Graphics Bar in the scene of the circle