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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。' m1 k' l3 j. G# t' B
- importPackage (java.lang);' C2 o# W% @* w9 D6 n
- importPackage (java.awt);
r2 ?) R* }" x' ~, R& E, a% t& M; {
7 B9 Y! h$ X# u- include(Resources.id("mtrsteamloco:library/code/face.js"));
" V' F( ~4 K0 y) [) {# u2 j' @ - * r) k' x1 p' K. I$ ?0 t) f
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
/ J6 x6 P3 F0 ?8 p
' c: B& n" G! Q8 K- function getW(str, font) {& J6 G- w! f( I; ? b0 z/ @
- let frc = Resources.getFontRenderContext();8 e6 b& @9 v( q. m
- bounds = font.getStringBounds(str, frc);2 g& U9 }/ l9 J5 g
- return Math.ceil(bounds.getWidth());( M) z" A8 Y0 @! I* z0 A5 L
- }5 W0 V6 h$ A' [8 d! O$ Y6 P
- $ I% g3 o: [# W* b
- da = (g) => {//底图绘制
$ w# U. S, o9 v2 U2 g - g.setColor(Color.BLACK);
$ j m* s' y; l2 m* K& ^ ^ - g.fillRect(0, 0, 400, 400);; m) e$ L& K* H/ O# x% W' w
- } c; ~6 e5 A8 d0 c0 f, @& }
- " F. X2 F* e/ {/ Q* G
- db = (g) => {//上层绘制. H4 L- N7 Z4 [0 l. _8 N/ [1 ]5 k
- g.setColor(Color.WHITE);; s/ d' C. u1 y: q6 b4 |
- g.fillRect(0, 0, 400, 400);) R' c, K/ q" Y( J& Q: t
- g.setColor(Color.RED);
# G6 `& e% n8 s& O! ~ - g.setFont(font0);
+ w% [' o% |/ {! }" w& g6 A" o - let str = "晴纱是男娘";( [0 O, `- {4 V$ j8 Q/ l
- let ww = 400;- S" Q2 i5 }! r; h
- let w = getW(str, font0);
: e; r& @! K7 |# O5 ~( i; a - g.drawString(str, ww / 2 - w / 2, 200);8 }2 D+ R u+ m6 S
- }* S9 W9 d' q5 M9 a ]# a
- : \- P3 { d. ^
- const mat = new Matrices();
& ~# c3 b" F$ [0 f9 C$ l - mat.translate(0, 0.5, 0);8 x: |% l0 k" X$ y) @# X
- 0 M$ h k3 v+ K! A' u Y
- function create(ctx, state, entity) {( v3 Z" C9 l4 R% v# K; B
- let info = {
7 c% r$ L6 Q7 | z6 W - ctx: ctx,
# e( k$ W7 V4 m7 E - isTrain: false,2 B/ q3 n5 L0 O1 p* D' b$ r
- matrices: [mat],( H* X+ ?6 Q7 u- e+ I
- texture: [400, 400],9 v) w0 D' f: Z/ ~
- model: {
* j4 n+ x8 q7 p6 x9 f - renderType: "light",$ t2 ~% [: E6 c4 l: u
- size: [1, 1],
/ ~8 f9 c$ S% g# d - uvSize: [1, 1]: B& M+ p# h, r4 v! m* }" W$ e
- }
8 w( r% ?' {' J7 j- j - }
/ K' d8 h4 W# W* I, ?* W - let f = new Face(info);
4 z5 D, \$ v+ n, h" U$ s - state.f = f;
* p( P4 q4 R) t8 c9 P3 t - : X* x# U8 L h+ q
- let t = f.texture;
% C) [ |2 o- ~% i- C9 L w - let g = t.graphics; F- ]& ]( f+ z! c8 Q1 E( V
- state.running = true;
3 O) l+ {& ]8 _! C- B( r% A - let fps = 24;( c. l) ~* X5 Y3 R
- da(g);//绘制底图
, P- x) R3 \; F1 D h+ o - t.upload();* e: g$ H6 I# J# k$ X9 P
- let k = 0;
7 i( P# s' O C8 {! C$ H3 P5 f& M0 I - let ti = Date.now();7 B: C& h6 ~# c7 W2 c
- let rt = 0;
1 G: m8 r' ~1 m - smooth = (k, v) => {// 平滑变化$ {: C, j' L; a6 G2 F/ d
- if (v > k) return k;
/ h5 R! B7 j$ k- s/ o, M - if (k < 0) return 0;
& ^8 Q+ Z7 V5 t' ^ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: c/ Z4 N' o% ?4 R7 f% Y
- }% m+ f7 X R4 f+ r: @2 \, w( b
- run = () => {// 新线程
! f' G4 c" c' z8 N+ O - let id = Thread.currentThread().getId();
$ Y% |. R) d5 f5 z - print("Thread start:" + id);
; A) G2 e' z2 q+ Z( Q& a/ m3 a - while (state.running) {) o; L$ [4 p# E/ p9 F
- try {8 Z2 ?( P3 F5 r; `
- k += (Date.now() - ti) / 1000 * 0.2;
; w( j2 R% \( m3 s - ti = Date.now();
2 W) N' r y Z, @ - if (k > 1.5) {
1 ?9 O9 ^4 y$ a$ ?' ~ - k = 0; r; E7 C9 d; v, v4 \
- }7 G6 c" b! a* l# N) |. H" m4 M* S
- setComp(g, 1);
. O: Z$ a( d+ R0 P5 v9 N3 f - da(g);% b# ^" F+ c7 e* `2 Y$ }
- let kk = smooth(1, k);//平滑切换透明度
p) p8 ?' `) C) }4 f# A7 b - setComp(g, kk);: n$ ^: T. p% ?1 A
- db(g);
# a6 l0 D/ Y" R' l5 T! v - t.upload();
, D3 b, U) N9 \7 G - ctx.setDebugInfo("rt" ,Date.now() - ti);* j2 \, E @4 w
- ctx.setDebugInfo("k", k);& _: p2 z8 e. G1 T+ M$ R4 R
- ctx.setDebugInfo("sm", kk);4 G- D- B3 U; B* ^6 a. v
- rt = Date.now() - ti;
+ p. B0 t8 V% e0 X/ T - Thread.sleep(ck(rt - 1000 / fps));) D, l. c1 ?2 E5 C( a: j
- ctx.setDebugInfo("error", 0)
% a$ F/ y2 h7 I - } catch (e) {* q- u9 e" y& ? u X
- ctx.setDebugInfo("error", e);: c& E, R# f) U( N
- }
0 T7 g2 }" i |2 s# u( ] - }
3 M1 k% n* \. M0 Q4 @ - print("Thread end:" + id);* G4 \! B& W9 L& \
- }
/ G5 M* ]" E' g9 a3 k - let th = new Thread(run, "qiehuan");
C8 C6 w9 J+ d6 t4 d: u$ i' i - th.start();
/ B* h. e) |* X( w3 Z# v" n - }
. x# m( V0 t2 g" a: O
. D% {" E7 i% V: i! G$ y- function render(ctx, state, entity) {7 ] G3 j) c" C! Q& P1 u6 ~0 a
- state.f.tick();3 A2 S! n6 i. A& S
- }
1 q2 Z/ N5 B, p* ]6 W2 Z9 w f - . z3 [" _1 e* V' ~( V) `
- function dispose(ctx, state, entity) {0 f: N" ?7 Z i- {7 d6 X4 j& ?/ |( ~
- print("Dispose");
2 L9 e7 M5 b0 ?& M, w$ i - state.running = false;& `- {5 c( \$ p. X+ _$ B
- state.f.close();
. ? b, K: x& |) K - }
# y* W) o1 x! B& I
+ q# {6 T3 {- a' H8 Z3 @( T$ Q- function setComp(g, value) {
8 X; v; g+ ?5 R g' B1 o- a - g.setComposite(AlphaComposite.SrcOver.derive(value));
" w- S! ^' V5 @' _ - }
复制代码
- G* [# c" S. W1 ^+ ~2 J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。- p7 @ S: o% [: ~/ S* V' i0 p) y
7 r0 M( Q5 k7 |0 j3 ^/ D0 c$ h' J& D! D8 \3 ?# s
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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