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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 p7 x# t4 @: H
- importPackage (java.lang);) y, ~9 B. ^% X7 Q
- importPackage (java.awt);. T. ?- O" k* O8 }- I
- 9 B) |# M+ U, Q2 x1 ^/ `2 n
- include(Resources.id("mtrsteamloco:library/code/face.js"));% k1 v3 m- a) k! l
2 \$ S7 @0 A& [* R* ]* v y/ e( ~- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 {6 u/ N8 V3 e/ Z/ U3 {; p- o+ J
( ]! c( B9 {5 h; `2 u9 d- function getW(str, font) {
! L! a, M4 G6 W( {4 r - let frc = Resources.getFontRenderContext();( ^$ s8 u" d' [- s
- bounds = font.getStringBounds(str, frc);
+ a- a: X' _. `8 }$ ^/ a2 r8 n - return Math.ceil(bounds.getWidth());6 d F @* {8 [. q( L: R6 s; H
- }
+ J" s8 s9 |7 V, }$ O3 W& X. \4 b- n* Y - : U5 B9 c& a7 w* E Q8 d
- da = (g) => {//底图绘制 E2 P1 |% C# g& A8 J9 X5 t$ e0 Q3 J. u
- g.setColor(Color.BLACK);; }/ L8 u- \6 }
- g.fillRect(0, 0, 400, 400);
- w, }, r4 E' A/ |1 a- |5 _ - }
0 R1 v7 _# X) h+ | - ; B" J! P7 n5 ]* n# K1 `- }7 }7 s
- db = (g) => {//上层绘制, |6 T1 r2 q2 \3 j% L# O) t
- g.setColor(Color.WHITE);
/ p$ ]" T5 m5 m5 e: d( T - g.fillRect(0, 0, 400, 400);6 V0 f, m. Y* l# X, r; }
- g.setColor(Color.RED);
. `2 H3 x7 [! p - g.setFont(font0);: P# ?% Y9 j* {6 D- f: ]
- let str = "晴纱是男娘";- O8 M n f9 |, n p8 T5 B' H
- let ww = 400;9 G, y$ m" N1 M
- let w = getW(str, font0);
& X! T" n0 @$ }1 p - g.drawString(str, ww / 2 - w / 2, 200);
Q/ ~5 f3 e# E+ `- y8 Z! H- ?. `! { - }; _6 [; ~1 [! H% W. P: [
' J- ]9 I8 r- R5 L7 [" y0 D- const mat = new Matrices();$ b$ H4 H- T. V4 v/ g7 i% K
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {% R/ e) g% O: G& q
- let info = {
B' F: W5 O6 h - ctx: ctx,
5 D) D, I4 m# y5 O. O1 X - isTrain: false,
3 h) ~* \- I' T6 _: s q t9 l - matrices: [mat],) h2 l1 F/ p! Q* H
- texture: [400, 400],
! F/ n2 l5 k0 g( C - model: {
" C$ H6 O; D$ _! |, z - renderType: "light",
3 D( m3 `, I! \ - size: [1, 1],
M; ]+ j Y% p. k - uvSize: [1, 1]
$ t; P- r0 h: l: B& m7 y f - }
+ k6 {$ S# \9 U* e/ ]5 ^ - }
+ Z7 s/ |# ]! G" H$ c m$ X - let f = new Face(info);' e! I' S- H5 D0 {, J8 A3 b
- state.f = f;' G o3 I$ f1 U+ B$ }% S7 ~+ Z/ y
- & @% k2 s2 f: a& F _4 a: t2 I
- let t = f.texture;& Z$ K& K2 p7 [' z" m
- let g = t.graphics;/ @1 J' C! \+ f* u r0 ^
- state.running = true;
: f- ^# D5 e0 e( m; @' H - let fps = 24;8 z d1 n! Y2 @6 r6 C" y, S- }8 I
- da(g);//绘制底图3 Z% I/ C- K- B" w4 i7 `) ]
- t.upload();
0 W. W Z- R; D s% h - let k = 0;3 G, b$ s5 M) o6 f
- let ti = Date.now();
& D# X; `4 Q8 u5 B! E' m1 @ - let rt = 0;
! b/ L" ~' ~3 F+ R% h [ - smooth = (k, v) => {// 平滑变化
7 F7 G/ X0 Q* u% p: I - if (v > k) return k;- x9 W: m1 I( q4 g6 b
- if (k < 0) return 0;3 J5 L2 ? T! E" z0 V- M n9 J
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 Y4 v& e! ?$ D; p& c7 u3 G
- }
7 t8 Z0 i) U/ y# h5 O: D, A - run = () => {// 新线程
* P/ t3 x$ T4 `2 h2 h4 l2 g% K - let id = Thread.currentThread().getId();
$ k8 B* t) r5 \; q# I - print("Thread start:" + id);
. \- Z8 `3 [) m! s% S: m7 ? - while (state.running) {3 a$ `* s, ?) b, |
- try {% r$ O- t# \! g4 q, b4 u' r9 O
- k += (Date.now() - ti) / 1000 * 0.2;
; N" b( X; z2 p1 v - ti = Date.now(); p4 X. p$ i2 n% b. x* |' E, O+ R- C' g
- if (k > 1.5) {
! V" L5 `, h3 G. N) u0 C: m - k = 0;
% l( B# Y' b" D& P/ w - }5 i' y8 j H5 L6 t' |
- setComp(g, 1);4 z% |- R N1 B" s) q' H) W
- da(g);
o t+ W$ ^9 K+ Z* n; x2 t - let kk = smooth(1, k);//平滑切换透明度
7 T/ o( ]& K3 ` - setComp(g, kk);
* U0 _7 @& K* \/ ^* G$ x6 |# H - db(g);
1 t; p; W" |: i( q* N" T7 @" T$ l - t.upload();8 \0 n+ r* k, h& ~ U- M0 n
- ctx.setDebugInfo("rt" ,Date.now() - ti);
" k1 L& I. n" r0 Q - ctx.setDebugInfo("k", k);. d8 [3 M) Y: M* i( ?+ z
- ctx.setDebugInfo("sm", kk);- o- _; {% q( p" |; K9 m5 o
- rt = Date.now() - ti;& ~0 z6 L1 J# F5 h8 F
- Thread.sleep(ck(rt - 1000 / fps));
/ k* Y; M; Z x* W6 v8 G" z - ctx.setDebugInfo("error", 0)$ i0 {, j; C8 W2 w% _7 B! e% N L
- } catch (e) {$ _9 X7 Y. W$ S) K- a( z# A, [
- ctx.setDebugInfo("error", e);1 X' D" p _' J {2 k' @: F+ w
- }" `9 r- f0 b" y0 k
- }% ]- n! o# W4 I7 J1 W
- print("Thread end:" + id);
' ^3 s' F& ]" P; x6 T% q) I - }: V) _9 P% K9 {7 t# i U1 L
- let th = new Thread(run, "qiehuan");! j& L* t s2 [' j( |
- th.start();
y% U) x7 B/ ?& r9 t0 X3 a1 ` - }
/ Q: q7 S* T6 ]* M
6 V' P" ` z+ B% J3 b" m) b- function render(ctx, state, entity) {
; y& D/ a3 I% Q- _4 E - state.f.tick();
1 [( C1 j4 |3 U - }& V% ]/ {) M2 _. @( u1 M
- 8 c4 A& n) K/ l
- function dispose(ctx, state, entity) {
9 x) v l# f# A( S7 N% ~& { - print("Dispose");
3 @) J3 ]- ]9 A! f; l6 U - state.running = false;: h H2 c# `1 ~9 k4 j U, Y
- state.f.close();
, c& t9 x! D% b3 }9 t3 A - }
6 y7 E5 L6 R& p/ V - 3 B& {, X. Q5 c
- function setComp(g, value) {
! A: w$ @- L9 \: E- E - g.setComposite(AlphaComposite.SrcOver.derive(value));
3 {4 x9 u$ J: |' C - }
复制代码
L7 [3 E F5 N9 A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。
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& o5 _$ j4 q* k- ^# Z/ }
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)6 x: K8 k v% Z" Y5 s
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