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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。
. R3 b+ t# Z% H1 V& A s% ~& z/ {- importPackage (java.lang);
8 K+ t$ B4 G5 p6 J9 C4 P- G - importPackage (java.awt);; D+ H# ?# N; E9 g8 g' I
- : P. V1 X' [( i/ ?- m P
- include(Resources.id("mtrsteamloco:library/code/face.js"));. e* O6 r) Z3 j {( i9 n* l( ]& F1 ?
- . v; z5 c8 {& J/ \1 S# h( B1 W
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ U6 v/ y; i8 B/ }+ @/ ^5 a, f
4 [5 i- ?. V/ ?8 D5 `2 w- U6 F' @- function getW(str, font) {: n# `, D8 X3 w1 H" z5 u5 ?
- let frc = Resources.getFontRenderContext();+ m+ C$ O1 _ j# u
- bounds = font.getStringBounds(str, frc);) z7 `* r3 O* y4 C) [* W/ s Z1 i
- return Math.ceil(bounds.getWidth());! h! C s1 h& Z
- } c- H$ z) ^) E0 S3 |- W; @- s
! ]2 {3 g8 | I: `) Y0 _- da = (g) => {//底图绘制
/ w& i4 b* i t' }$ f' D c - g.setColor(Color.BLACK);$ v# b2 I; f% G; T# L" k' d9 g/ D6 N
- g.fillRect(0, 0, 400, 400);! ~% p3 Q) |+ h
- }
: w5 u- @6 E5 u3 F* [. Y& I" ~
- m( I; R0 `2 L( T- db = (g) => {//上层绘制) H6 {' F, l1 Q: g& a3 Q3 f
- g.setColor(Color.WHITE);
% L- {4 e, t* D2 |( V* Q6 w4 _ - g.fillRect(0, 0, 400, 400);7 S4 q; G+ d3 c
- g.setColor(Color.RED); g4 @3 J+ x$ e$ W+ Z
- g.setFont(font0);
" |3 H7 w# v$ { - let str = "晴纱是男娘";
1 F( g# J2 @) Z7 o. E - let ww = 400;
( ?5 T7 t+ k; h" Q - let w = getW(str, font0);* }$ P" v6 p7 e- B; E
- g.drawString(str, ww / 2 - w / 2, 200);
9 w& V" g$ x3 g# c - }- W4 I9 a4 P5 M6 q( S) p" l
" ]0 M4 s9 g! K) J7 K8 J C- const mat = new Matrices();0 O* P& v& z7 L: Y- [
- mat.translate(0, 0.5, 0);
! P) K# q- Z( `5 v: H0 i+ x - , V7 C# B" `& {! ]" S; _. R. |
- function create(ctx, state, entity) {
4 r: O2 a( _' d; F( V& A" D! l5 X - let info = {
6 H- R( ~# D9 V+ b& T$ k - ctx: ctx,# ~; F: o8 W; n. {, V& q
- isTrain: false,! Y* A; e" O$ x3 ^9 i$ f, _
- matrices: [mat],
5 ^9 H, k! R! {+ w3 x- n - texture: [400, 400],
6 m/ w. o% t0 T; @ - model: {6 f. I1 p% x1 B. t! X
- renderType: "light",8 _# w1 n) S- O8 P' i/ a; R' F
- size: [1, 1],
# m S/ O6 U/ [5 L4 N! g8 h4 v, d - uvSize: [1, 1]% V1 \4 _5 Y) u8 R% J
- }5 @( R5 b' E B
- }9 x" Q& k- |. H
- let f = new Face(info);
: F6 n6 a$ F) N. P7 O - state.f = f;7 b7 }9 K. K; v0 }
- 5 E6 m2 k2 \" _* q$ L" g5 Q6 b& _
- let t = f.texture;
J: f: G) S' W, ]5 ? - let g = t.graphics; n( o8 N% g9 I; ~' J9 s
- state.running = true;
- X( G0 ? N5 }% H2 {; M - let fps = 24;
9 g# E4 q* o! S' c- @, S - da(g);//绘制底图0 M! Y( e3 V1 w" S: k* A
- t.upload();
8 s5 e( \9 C7 @7 S" H7 ~ - let k = 0;9 X. G1 p h8 k( Z3 f6 u& k
- let ti = Date.now();
+ v9 }$ ~+ Q( {( G - let rt = 0;8 J; `3 h! M1 Z S: w0 w+ Y' G' I
- smooth = (k, v) => {// 平滑变化$ J% F v) r, u, g0 k) C8 t
- if (v > k) return k;
9 _& d$ ?0 {4 X# N4 ~% x - if (k < 0) return 0;- g( B4 f3 z8 @9 g
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 [2 O. T" D5 Q3 f5 }9 t9 t - }
3 q7 _# q8 H% V0 y" i+ ^ - run = () => {// 新线程
; @& V' v' ~6 h. W! `4 A - let id = Thread.currentThread().getId();
# S. `% a% L: d4 A& | - print("Thread start:" + id);
0 `) \) Q T4 `% Y - while (state.running) {3 x: ?' Q) p8 Q( p
- try {% T% [+ r3 {, Z8 S, j6 W
- k += (Date.now() - ti) / 1000 * 0.2;
& h0 E0 I! Z# v! y$ \* D: c: s - ti = Date.now();* O2 i5 k) l( D1 ?
- if (k > 1.5) {
8 V% ]4 Z( B. k: F - k = 0;2 s5 w. t8 x: J; R" T$ j/ w# @ r
- }
X8 p( v+ z- n - setComp(g, 1);- `) Y: d5 x( \6 m) v* h
- da(g);0 Z( e7 K4 e% v3 W+ c
- let kk = smooth(1, k);//平滑切换透明度7 U9 V2 M/ a6 L- k' [+ n
- setComp(g, kk);# N5 a1 J, \5 ^
- db(g);
) l6 E5 Z! N8 z - t.upload(); ^& x1 X" b7 E9 ?, n. D
- ctx.setDebugInfo("rt" ,Date.now() - ti);
- h5 L' I* `% ?3 d8 u - ctx.setDebugInfo("k", k);# y% m! x+ ]5 Q
- ctx.setDebugInfo("sm", kk);/ N R! t0 u: p5 O. b ]
- rt = Date.now() - ti;! W ^; E( e D# n4 m% s' U
- Thread.sleep(ck(rt - 1000 / fps));
* ?! Y+ R1 \2 [8 Z b" A# ^8 ? - ctx.setDebugInfo("error", 0)
) Z0 K2 H ~ X/ u: ~1 i% g - } catch (e) {
3 P) A6 k* u" ^+ Q- l - ctx.setDebugInfo("error", e);
$ l: |0 c! ^% `# N7 ]6 _4 g$ d - }
5 v+ Q( N, b/ z0 s - }8 Z0 U1 b" W2 A3 P+ q
- print("Thread end:" + id);2 k Y. j' z& @* S) R, M" z
- }) Q: b' |$ r! I8 F- R, o, t: F; z
- let th = new Thread(run, "qiehuan");, B- z6 P) x9 X3 d
- th.start();3 |( Z0 |2 d6 M
- }
* @* L1 F5 i4 V- M4 P - : e/ s1 k; Y0 i( _6 l& d
- function render(ctx, state, entity) {- a U9 q( M! E. O; A
- state.f.tick();
# D" J3 U3 @+ l - }; |, S/ B$ v1 S
- 4 Q# ]5 i( V/ C$ ~9 i
- function dispose(ctx, state, entity) {
+ k7 X* [' h$ }0 Y. ] t - print("Dispose");! J9 N. U6 n2 j/ L. s) l8 W6 b. ~( ]
- state.running = false;
/ ^3 d: {7 `2 J - state.f.close();, K* M& C0 Q; m
- }4 o4 n; F8 O) q$ f4 ?5 A
- ) G0 f/ E, T# [# M4 E! E
- function setComp(g, value) {1 E6 O6 C3 T2 c5 j+ i% d. t0 B
- g.setComposite(AlphaComposite.SrcOver.derive(value));
' _# l( ^; d; W7 {: H* b1 V - }
复制代码 " c5 s2 |, A; }+ k& K5 x4 M
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。% q1 y; \ a7 t% J
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$ D9 j7 Z) G8 e. ~" l8 v顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)2 o& U; X) n- _: T
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