diff --git a/src/app.ts b/src/app.ts
index c2911e3..15be461 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1,71 +1,118 @@
+import { vec3 } from "gl-matrix";
 import { Drawer2D } from "./drawer2D";
 import { Drawer3D } from "./drawer3D";
 import { TriangleDrawer } from "./triangle_drawer";
 
+class InputMap{
+    private pressedKey:Set<string>;
+    //private mouseLast : [number,number];
+    private mouseDelta : [number,number];
+    constructor(){
+        this.pressedKey = new Set<string>();
+        this.mouseDelta = [0,0];
+    }
+    registerHandler(){
+        const self = this;
+        document.addEventListener("keydown",(ev)=>{
+            if(self.pressedKey.has(ev.key)){
+                console.log(ev.key,"pressed");
+            }
+            self.pressedKey.add(ev.key);
+        });
+        document.addEventListener("keyup",(ev)=>{
+            const exist = self.pressedKey.delete(ev.key);
+            if(exist){
+                console.log(ev.key,"released");
+            }
+        });
+    }
+    isPressed(keyname:string){
+        return this.pressedKey.has(keyname);
+    }
+}
+
+/** get timestamp counter in millisecond*/
+function getCurrentTime() : number{
+    return performance.now();
+}
+const MillisecondPerFrame = 1000/60;
 export class CanvasApp{
     readonly gl: WebGL2RenderingContext;
+    private n : number;
     renderer: Drawer2D;
     trenderer : TriangleDrawer;
     r : Drawer3D;
+    inputMap: InputMap;
     constructor(gl: WebGL2RenderingContext){
         this.gl = gl;
         this.renderer = new Drawer2D(gl);
         this.trenderer = new TriangleDrawer(gl);
         this.r = new Drawer3D(gl);
+        this.inputMap = new InputMap();
+        this.inputMap.registerHandler();
     }
     intialize():boolean{
         this.renderer.prepare();
         this.trenderer.prepare(this.gl);
         this.r.init();
-
-        document.addEventListener("keydown",(e)=>{
-            if(e.key == "h"){
-                this.r.camera.rotateRight(Math.PI * 5 / 180.0);
-            }
-            if(e.key == "f"){
-                this.r.camera.rotateRight(-Math.PI * 5 / 180.0)
-            }
-            if(e.key == "t"){
-                this.r.camera.rotateUp(Math.PI * 5 / 180.0)
-            }
-            if(e.key == "g"){
-                this.r.camera.rotateUp(-Math.PI * 5 / 180.0)
-            }
-            if(e.key == "d"){
-                this.r.camera.pos[0] += 0.5;
-            }
-            if(e.key == "a"){
-                this.r.camera.pos[0] -= 0.5;
-            }
-            if(e.key == "w"){
-                this.r.camera.pos[2] += 0.5;
-            }
-            if(e.key == "s"){
-                this.r.camera.pos[2] -= 0.5;
+        let escPressed = false;
+        document.addEventListener("mousemove",(ev)=>{
+            if(!escPressed){
+                this.r.camera.rotateRight(Math.PI / 180.0 * ev.movementX);
+                this.r.camera.rotateUp(Math.PI / 180.0 * ev.movementY);
+            }
+        });
+        document.addEventListener("keydown",(e)=>{
+            if(e.key == "Escape"){
+                escPressed = !escPressed;
             }
         });
-
         this.gl.clearColor(0,0,0,0);
         this.gl.clearDepth(1);
         this.gl.enable(this.gl.DEPTH_TEST);
         return true;
     }
-    startRun(){
-        const current = new Date();
+    handleInput(){
+        const Speed = 0.5;
+        let forward = this.r.camera.forward;
+        let right = this.r.camera.right;
+        vec3.scale(forward,forward,Speed);
+        vec3.scale(right,right,Speed);
+        if(this.inputMap.isPressed("d")){
+            vec3.add(this.r.camera.pos,this.r.camera.pos,right);
+        }
+        if(this.inputMap.isPressed("a")){
+            const r = vec3.create();
+            vec3.negate(r,right);
+            vec3.add(this.r.camera.pos,this.r.camera.pos,r);
+        }
+        if(this.inputMap.isPressed("w")){
+            vec3.add(this.r.camera.pos,this.r.camera.pos,forward);
+        }
+        if(this.inputMap.isPressed("s")){
+            const f = vec3.create();
+            vec3.negate(f,forward);
+            vec3.add(this.r.camera.pos,this.r.camera.pos,f);
+        }
+    }
+    startRun(synctime = 0){
+        const beforeLoop = getCurrentTime();
         this.loop();
-        const delta = (new Date().getMilliseconds()) - current.getMilliseconds();
-        const delay = (delta < 16) ? (16 - delta) : 1;
+        const afterLoop = getCurrentTime();
+        const delta = afterLoop - beforeLoop - synctime;
+        const delay = (delta < MillisecondPerFrame) ? (MillisecondPerFrame - delta) : 0;
         setTimeout((()=>{
-            this.startRun();
+            const afterWait = getCurrentTime();
+            this.startRun(afterWait - afterLoop - delay);
         }).bind(this),delay);
     }
     loop(){
-        
+        this.handleInput();
     }
     startDraw(){
-        this.drawScene();
+        this.drawScene(0);
     }
-    drawScene(){
+    drawScene(time:DOMHighResTimeStamp){
         this.gl.viewport(0,0,this.gl.canvas.width,this.gl.canvas.height);
         this.gl.clear(this.gl.COLOR_BUFFER_BIT|this.gl.DEPTH_BUFFER_BIT);
         //this.renderer.draw(this.gl,{});
diff --git a/src/camera.ts b/src/camera.ts
index 53a6143..91fa242 100644
--- a/src/camera.ts
+++ b/src/camera.ts
@@ -1,49 +1,82 @@
-import {mat4, vec3, quat, mat3} from "gl-matrix";
+import { mat4, vec3, quat, mat3 } from "gl-matrix";
 
-export class Camera{
-    pos:vec3;
-    rot:quat;
-    #proj : mat4;
-    fovY : number;
-    aspect : number;
-    far : number;
+export class Camera {
+    pos: vec3;
+
+    yaw: number;
+    pitch: number;
+    roll: number;
+
+    #proj: mat4;
+
+    fovY: number;
+    aspect: number;
+    far: number;
     near: number;
-    constructor(pos:vec3,rot?:quat){
+    constructor(pos: vec3) {
         this.pos = pos;
         this.#proj = mat4.create();
-        if(rot == undefined){
-            const lookAt = mat4.lookAt(mat4.create(),this.pos,[0,0,0],[0,1,0]);
-            const rotMat = mat3.fromMat4(mat3.create(),lookAt);
-            this.rot = quat.fromMat3(quat.create(), rotMat);
-            //quat.normalize(this.rot,this.rot);
-            //quat.conjugate(this.rot,this.rot);
-        }
-        else{
-            this.rot = rot;
+        this.yaw = 0;
+        this.pitch = 0;
+        this.roll = 0;
+        console.log("forward" , this.forward);
+        console.log("up" , this.up);
+    }
+    rotateRight(rad: number) {
+        this.yaw += rad;
+        if(this.yaw >= Math.PI * 2 ){
+            this.yaw -= Math.PI * 2;
         }
     }
-    rotateRight(rad:number){
-        quat.rotateY(this.rot,this.rot,rad);
+    rotateUp(rad: number) {
+        this.pitch += rad;
+        this.pitch = Math.min(this.pitch, Math.PI * 89/ 180);
+        this.pitch = Math.max(this.pitch, - Math.PI * 89 / 180);
     }
-    rotateUp(rad:number){
-        quat.rotateZ(this.rot,this.rot,rad);
+    rotateClockwise(rad: number) {
+        this.roll += rad;
     }
-    rotateClockwise(rad:number){
-        quat.rotateX(this.rot,this.rot,rad);
-    }
-    get viewMatrix():mat4{
-        const p = vec3.negate(vec3.create() ,this.pos);
-        const t = mat4.fromTranslation(mat4.create(),p);
-        const r = mat4.fromQuat(mat4.create(),this.rot);
-        return mat4.mul(mat4.create(),r,t);
+    get viewMatrix(): mat4 {
+        const eye = vec3.create();
+        const lookAt = mat4.create();
+        vec3.add(eye, this.pos, this.forward);
+        return mat4.lookAt(lookAt, this.pos, eye, this.up);
     }
     /**
      * update projection matrix
      */
-    UpdateProjectionMat(){
-        mat4.perspective(this.#proj,this.fovY,this.aspect,this.near,this.far);
+    UpdateProjectionMat() {
+        mat4.perspective(this.#proj, this.fovY, this.aspect, this.near, this.far);
     }
-    get projectionMatrix():mat4{
+    get projectionMatrix(): mat4 {
         return this.#proj;
     }
+    get forward(): vec3 {
+        const sinYaw = -Math.sin(this.yaw);
+        const cosYaw = Math.cos(this.yaw);
+        const ret = vec3.fromValues(sinYaw * Math.cos(this.pitch), -Math.sin(this.pitch), cosYaw * Math.cos(this.pitch));
+        vec3.normalize(ret,ret);
+        return ret;
+    }
+    get up(): vec3 {
+        const right = vec3.cross(vec3.create(),this.forward,[0,1,0]);
+        vec3.normalize(right,right);
+        const ret = vec3.cross(vec3.create(),right,this.forward);
+        vec3.normalize(ret,ret);
+        /*const a = Math.sin(this.yaw);
+        const b = Math.cos(this.yaw);
+        const u = vec3.fromValues(b * Math.sin(this.pitch), Math.cos(this.pitch), a * Math.sin(this.pitch));
+        const v = vec3.create();
+        vec3.cross(v, u, this.forward);
+        const ret = vec3.create();
+        const tmp1 = vec3.create();
+        const tmp2 = vec3.create();
+        vec3.add(ret, vec3.scale(tmp1, u, Math.cos(this.roll)), vec3.scale(tmp2, v, -Math.sin(this.roll)));*/
+        return ret;
+    }
+    get right(): vec3 {
+        const ret = vec3.create();
+        vec3.cross(ret, this.up, this.forward)
+        return vec3.cross(vec3.create(),this.forward,[0,1,0]);;
+    }
 };
\ No newline at end of file
diff --git a/src/drawer3D.ts b/src/drawer3D.ts
index ea0a487..321477b 100644
--- a/src/drawer3D.ts
+++ b/src/drawer3D.ts
@@ -9,7 +9,7 @@ import { Camera } from "./camera";
 import * as G from "./glWrapper";
 import { Drawable, RenderState } from "./drawable";
 import { Model } from "./model";
-import { mat4 } from "gl-matrix";
+import { mat4, vec3 } from "gl-matrix";
 
 
 export class Drawer3D implements Drawable{
@@ -52,9 +52,11 @@ export class Drawer3D implements Drawable{
 
             this.program.setUniformMat4f(gl,"viewMat",this.camera.viewMatrix);
             this.program.setUniformMat4f(gl,"projectionMat",this.camera.projectionMatrix);
-            this.program.setUniformMat4f(gl,"modelMat",mat4.fromTranslation(mat4.create(),[0,0,0]));
-            
-            this.model.draw(gl);
+            for(const pos of [[0,0,0],[0,0,25],[40,0,25]]){
+                this.program.setUniformMat4f(gl,"modelMat",mat4.fromTranslation(mat4.create(), vec3.fromValues(pos[0],pos[1],pos[2]) ));
+                
+                this.model.draw(gl);
+            }
         }
     }
 }
\ No newline at end of file
diff --git a/src/model.ts b/src/model.ts
index c94a8e8..11f0fca 100644
--- a/src/model.ts
+++ b/src/model.ts
@@ -43,7 +43,9 @@ export class Model{
         for(const [name,buf] of Object.entries(this.vertexes)){
             const loc = p.getAttribLocation(gl,name);
             assertBoolean(loc >= 0,"there is no",name,"attribute");
-            this.vao.addBuffer(gl,buf,loc,VertexLayouts[name]);
+            if(loc >= 0){
+                this.vao.addBuffer(gl,buf,loc,VertexLayouts[name]);
+            }
         }
         this.ibo.bind(gl);
         this.vao.unbind(gl);