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; s* D8 Y4 N3 |( T1 s4 ~: X$ b这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。
( `9 j( n0 _9 T- I; o- importPackage (java.lang);
L& ~% c; @/ c, H% _' n# j - importPackage (java.awt);
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d% L! H- x: d8 Q' S- include(Resources.id("mtrsteamloco:library/code/face.js"));
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. D4 Y7 q, {' t- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 u" L- |) P/ y: l
( q" I4 a1 D+ X4 |; h- function getW(str, font) {- j; j$ l( M( M: |% s! p7 S
- let frc = Resources.getFontRenderContext();" s9 b2 l2 M9 |+ t9 v" b2 z3 D7 t' D+ P
- bounds = font.getStringBounds(str, frc);; g3 f, u. v1 z3 P$ A
- return Math.ceil(bounds.getWidth());2 z6 r, ?) N9 D8 w
- }
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- da = (g) => {//底图绘制% O3 g. t; g$ j$ @( F* T
- g.setColor(Color.BLACK);! ]) O _% @' @0 S" \
- g.fillRect(0, 0, 400, 400);. x' N* ?$ p+ `' g: M0 F4 Q
- }
. y% v. r8 H+ y6 [$ d) A
$ _" x. x$ k) F7 d$ Z9 F; ?- db = (g) => {//上层绘制' X, A( C# G2 M+ ^; D" ~0 G/ G
- g.setColor(Color.WHITE);' ]' [, X% v/ c
- g.fillRect(0, 0, 400, 400);
h3 \: I6 {5 h0 C7 x0 ` - g.setColor(Color.RED);
- S+ z5 c N# _/ P8 V$ J - g.setFont(font0);8 M- |% _+ X0 Q
- let str = "晴纱是男娘";
' X" S# l+ ^3 v* k - let ww = 400;
6 p7 o" P, |+ ?4 ^# \! T - let w = getW(str, font0);* N G0 x$ q& Q3 Z2 |' a7 ^! \
- g.drawString(str, ww / 2 - w / 2, 200);- k& I6 a' s O( u- x$ q' P
- }
- h0 p4 F- R; u u0 z - / }: v6 G- t/ ?
- const mat = new Matrices();
4 A& `1 R) Y! R% ^ - mat.translate(0, 0.5, 0);$ H$ r' E' E# V# L
- , H- Q7 e' r& [1 v1 ~
- function create(ctx, state, entity) {( K' N) x$ w! o1 w! g! }% [
- let info = {: Y3 w: \' z, W: {
- ctx: ctx,7 r# K @! T0 B+ t9 e
- isTrain: false,2 v2 z' w3 i5 t5 |9 Z9 r
- matrices: [mat],4 I2 x! x3 w9 z, i+ l; E9 E/ d6 r
- texture: [400, 400],
6 l2 {, L' \4 j, f& m" I - model: {9 u9 G) W0 b. Z# l0 j7 [6 @2 `; @2 c9 g
- renderType: "light",
# V- l; o' M" G6 g9 e - size: [1, 1],
0 q1 k4 D* _) g$ z* p - uvSize: [1, 1]
3 a* [2 w) Q6 V - }
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- let f = new Face(info);0 |4 v+ i9 C# t, E0 ]0 I+ L' W
- state.f = f;
( H3 M W0 w# R( p, z - 3 U7 `/ U. \/ L- S
- let t = f.texture;; [! T1 o5 D3 ?
- let g = t.graphics;
* P G" V/ ~' f0 z3 t7 `1 }2 Z' F* d - state.running = true;
8 {- D0 J& S& d" Y - let fps = 24;
+ K3 o0 J7 B: f, m4 ` - da(g);//绘制底图
* W' t6 D, e0 B+ k# i3 [+ U - t.upload();
7 y ~) d3 ^3 y5 [ m3 _* F2 H - let k = 0;
. M& ^6 @% x# Z: q7 @$ L2 R4 t - let ti = Date.now();( C7 O# t9 l+ k! A, Q2 r) `
- let rt = 0;
" W9 J; S. l, I9 B8 O' x7 W - smooth = (k, v) => {// 平滑变化+ x& W7 d' Q" K+ f
- if (v > k) return k;0 X$ }; a% K; L; T6 D2 d8 I2 w& p
- if (k < 0) return 0;8 A' P( \ v5 Q! U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& |/ f6 P! o) _; y7 |1 X - }
: f: o2 X& ^1 j4 Q6 [( h p4 |+ } - run = () => {// 新线程
: Y0 H) S) q$ e) a - let id = Thread.currentThread().getId();0 i+ R& N; Q# O( C. k" C
- print("Thread start:" + id);
/ ?3 c# D$ u6 B F$ b) ~ - while (state.running) {4 g7 ?8 g& E3 }& ^$ z6 p0 u- g
- try {' p3 u4 r b- D% t1 Z: z6 |
- k += (Date.now() - ti) / 1000 * 0.2;8 a9 h* S9 [) d! s
- ti = Date.now();
+ T) z1 `5 e b9 Q5 l$ P) C - if (k > 1.5) {
, i& T1 K, |* r7 u p2 ` - k = 0;' V9 R, ]! J+ u" {' I
- }
3 q- C3 f6 C' v- `8 e5 F - setComp(g, 1);
# @6 M! o; l- h7 X; N - da(g);. u' c7 r( f# K' K" Q5 t
- let kk = smooth(1, k);//平滑切换透明度7 f8 H% D8 ?6 T/ |9 d$ K9 @
- setComp(g, kk);6 p1 P. p7 ], e& ]
- db(g);
/ r4 E; V* i$ v7 U9 c! b - t.upload();+ U7 X7 ~$ j. z# o
- ctx.setDebugInfo("rt" ,Date.now() - ti);- r# C) ]; v1 g6 B7 \0 W4 N
- ctx.setDebugInfo("k", k);0 B3 G0 `1 Q! {6 o- o
- ctx.setDebugInfo("sm", kk);
. ~" y, s5 V4 \ - rt = Date.now() - ti;: b2 |+ |" b- s! v" M7 c& E
- Thread.sleep(ck(rt - 1000 / fps));' Q, c8 _9 F7 b! K5 S8 ?" s. z
- ctx.setDebugInfo("error", 0)
" C, D% v' S" J9 l - } catch (e) {# C& p0 E% M% b) G, E a! |
- ctx.setDebugInfo("error", e);
5 f/ M9 l: u3 Z6 Z- ?4 ]( S3 W - }
( c7 O2 n" S% b5 U$ Z, w" p - }
6 w! _- o3 t% n8 I - print("Thread end:" + id);. v0 ~0 J1 F4 x7 a S) }/ G
- }
. t3 C3 |8 o, O - let th = new Thread(run, "qiehuan");$ [' d ~/ o6 f% O# J/ r) H
- th.start();+ L9 x( Q2 ^0 y7 `2 ]4 }7 J. u; C
- }
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- function render(ctx, state, entity) {
* o& ~; X/ b) q - state.f.tick();
d) `& t- h, z - }! \; L( f+ a- w9 d2 ~$ C
+ {% R( w. r- S: x* y1 u( o- function dispose(ctx, state, entity) {
, ?$ n" f7 _ T# W - print("Dispose");
7 e" v3 G( I, {, j/ v$ N - state.running = false;$ b5 O: }8 h; t% d9 p d
- state.f.close();
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( w$ U9 q5 ` J" W3 e6 W' n- function setComp(g, value) {5 L: t1 F! ?5 ^% b6 A: _; K+ r( b
- g.setComposite(AlphaComposite.SrcOver.derive(value));8 k! S# Q0 `# O- I/ Y
- }
复制代码
% |" Z$ h( D" A) T6 B$ v写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。# x- m: a8 d/ M+ F6 R
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! B, Z% Q* h' A" D$ @1 d顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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