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- H$ m# ~1 D& {2 Y J2 l1 o- _& n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。5 Q4 [. H6 `- ~6 {" d
- importPackage (java.lang);
% L/ |7 d" U- f: M! {( W9 x - importPackage (java.awt);
( j m4 i( l7 b) {( r
* Q9 I M% q% G8 @- include(Resources.id("mtrsteamloco:library/code/face.js"));! z% ], W, I6 Q. _
- & V- N* ~; k u6 q0 D& X
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; q+ \% i, F& |1 S8 N
1 D* u8 Q! S C/ N" q: O x- function getW(str, font) { n7 D- q; M; X; i1 m
- let frc = Resources.getFontRenderContext();
L7 E' H9 M! W, k' z6 z - bounds = font.getStringBounds(str, frc);
5 v) f- ~# _5 ?% b) q; X$ y, \ - return Math.ceil(bounds.getWidth());
# b' O' _' N4 X9 U5 c8 | - }" k' D8 [8 n' p! X
- * w" U/ s3 v# O
- da = (g) => {//底图绘制
& S, a7 S8 L7 u8 D: B5 } - g.setColor(Color.BLACK);: m; H2 w/ S1 a0 W' K: }7 {
- g.fillRect(0, 0, 400, 400);
4 w) X$ g. a U) Z/ K1 i! M( Z y - }
& M! z! T# Q" l8 L - 2 B- L: K: C* u+ V6 ?& j) W! H8 d* e* u
- db = (g) => {//上层绘制
# M6 F7 L; O3 `2 K, L' n- V - g.setColor(Color.WHITE);
* }- b! ]- u4 I# c' d - g.fillRect(0, 0, 400, 400);' @1 X5 C8 v/ X- O- i" O" L0 C/ o
- g.setColor(Color.RED);
8 k' S$ O }6 W7 t - g.setFont(font0);$ J1 W& o6 x2 Z- d
- let str = "晴纱是男娘";
1 L1 J. M! {- p J - let ww = 400;' L P! v, R8 U# d' w
- let w = getW(str, font0);
( A Z+ t/ i! m/ S4 g- e' o- {7 y! c - g.drawString(str, ww / 2 - w / 2, 200);! f; m2 w2 }: O+ l
- }/ h; Z1 F; V' o5 R
- / x7 n2 h6 u+ j3 H# Y
- const mat = new Matrices();9 s' W" J2 T' E" {, h! j
- mat.translate(0, 0.5, 0);' M, ^' A) d2 {- G
- ) w% w0 C8 F* [! B
- function create(ctx, state, entity) {/ P1 U( e! i. |( l- G6 m
- let info = {
! |7 H# Z0 p. {# ~; Z - ctx: ctx,6 V$ N; _; ]. o3 S8 A
- isTrain: false,
$ B5 d7 @$ u' D$ u - matrices: [mat],
1 @- t' \) h' X: L6 s3 i. ^) K - texture: [400, 400],, n" `: p* ?" U
- model: {" `0 ~$ }( y. X
- renderType: "light",
7 F: \. h$ x$ c, ?4 F - size: [1, 1],2 s$ Z7 I, a) o1 ?( n
- uvSize: [1, 1] f) p% s) C& L9 ~
- }% ]: }6 C4 u6 k/ F8 W- N5 c
- }
: Q: u, h* d+ u% B% R$ C - let f = new Face(info);
8 i- \) I: m/ t4 l7 p" ]1 ~ w - state.f = f;
" e% F: r8 ?, U) u$ D - 8 e3 U: x: n: k, O: E# X
- let t = f.texture;) H9 W9 k$ a7 g E, u
- let g = t.graphics;1 }8 {$ M; P$ S6 @
- state.running = true;
" f2 R6 i1 o4 [! q - let fps = 24;1 E4 G! j/ o) X' w1 s
- da(g);//绘制底图
# X0 g1 U/ ^: c1 M# Q - t.upload();
- z; Q- S, e0 x" }# ~, T - let k = 0;3 j- [/ \8 v. n0 T0 w6 J' _- Y- R
- let ti = Date.now();' N! r8 \ c7 h. ^) q2 N
- let rt = 0;4 U& L5 ]3 n) T- d" k/ i7 X
- smooth = (k, v) => {// 平滑变化
- }* F: L) a2 i1 [. v - if (v > k) return k;
& b1 Y; }" m) K/ f5 B ^9 A - if (k < 0) return 0;
% Z6 t% _+ V& ^8 f, x - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. S3 u. c6 C6 @# K* e - }
& p) v' u0 t0 g - run = () => {// 新线程
2 f( G. r" d1 v1 }' u+ V6 v - let id = Thread.currentThread().getId();# o2 o( T5 M- C- G0 J# V4 u1 g
- print("Thread start:" + id);1 L! m- h0 f" {7 P& r
- while (state.running) {
6 {, P7 u! Q' Z& T: w$ y! X) i - try {/ F3 I" G5 U1 U' X2 e8 o. g
- k += (Date.now() - ti) / 1000 * 0.2;0 E" v& D0 h @5 g1 x
- ti = Date.now();
# h* k: N( p! n1 q - if (k > 1.5) {
1 n" O% |7 j0 y" \ - k = 0;7 j3 m2 \2 t% r
- }7 G& ^$ e9 j' R* T! H. L0 _$ T0 u
- setComp(g, 1);
5 v$ O4 L2 |: D* z - da(g);; }* j5 a6 W. R8 C/ ~. r
- let kk = smooth(1, k);//平滑切换透明度
9 G$ m3 c r. i! d! q - setComp(g, kk);% r- c3 t& Y7 \; e3 \- j7 K
- db(g);& @/ A& N& R. v8 @) o
- t.upload();
4 a* J8 q3 ~. v3 y* a" @4 U - ctx.setDebugInfo("rt" ,Date.now() - ti);
+ z9 D5 Y6 b% E! s - ctx.setDebugInfo("k", k);% f3 M _/ @+ L9 u! _. D( W
- ctx.setDebugInfo("sm", kk);
8 k, C8 N/ |& \4 \. Z- D @( p - rt = Date.now() - ti;
+ W# t: @2 B2 t8 o" _5 k) D9 i& I - Thread.sleep(ck(rt - 1000 / fps));
2 W4 Y9 @) o0 C+ T - ctx.setDebugInfo("error", 0)
! a% M7 T5 T, t - } catch (e) {6 j$ x4 y# n6 a M( c* g
- ctx.setDebugInfo("error", e); _8 N4 M: o% |* `: m* y6 l
- }, \1 F D# y5 j7 i3 g q
- }# M; P% ?4 s8 H) D, Z- n
- print("Thread end:" + id);. \# M8 j7 W0 t9 _4 ]
- }, N2 x3 m: I) t6 g
- let th = new Thread(run, "qiehuan");# ~6 m$ P$ P$ y: C+ G
- th.start();% F' z3 z7 F' ~: S; a
- }
) a- V+ L1 G: G
9 l# F- J! d& l* ]! h- function render(ctx, state, entity) {2 X3 g# B; n5 v# y
- state.f.tick();
& z# e& J9 |0 D7 m& d% `. H - }3 p7 U3 f9 R# H# G
- 6 q* a8 \. F( |
- function dispose(ctx, state, entity) {
! i+ ]) X7 M0 v# z$ @) { b - print("Dispose");
( C9 e* o; E: R& d5 Z6 } l% U% G' `8 } - state.running = false;
& I' s; e" X' w5 d+ N2 I$ o# Z/ q) j - state.f.close();
1 h" ~+ f4 }+ r. H4 R6 a7 } - }
: ?) X* M$ p/ [9 j, U& h6 a9 ]
3 F5 E' y. l& U5 I' S- function setComp(g, value) {" O; Y" z8 d5 t9 `! Y* A# `: S
- g.setComposite(AlphaComposite.SrcOver.derive(value));
4 P f. V5 G( l# G - }
复制代码
* ^- w) u- ?% }, e$ R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。
( ?5 Q/ s0 G$ \$ D! B9 j$ A5 R0 W# ^3 e% N5 i. o
1 d# Z' E# r4 D7 ]8 F, {& X9 T顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)9 Y4 V2 s& A! z8 t. x7 j
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