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' y* z- {( W/ M; K$ 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。; m6 [. E) F% h/ o
- importPackage (java.lang);3 H' D7 Z9 E8 `, |; g
- importPackage (java.awt);
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8 V J6 F' w& h# w, h- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! Y) R5 ]7 P; M' I- W4 `: t, Y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {9 C/ |* F4 d Y9 g" X
- let frc = Resources.getFontRenderContext();
/ E9 S: B" r( m9 e3 g - bounds = font.getStringBounds(str, frc);- u( s) s+ J, D( @* A/ r
- return Math.ceil(bounds.getWidth());
, E H* a8 m, `8 D, e% r! M4 s - }
- a/ ?, i/ Y4 F T9 Y/ M - , A2 Y7 d3 X0 ~0 T& w
- da = (g) => {//底图绘制' b0 X; X/ U7 S6 m
- g.setColor(Color.BLACK);3 N, `0 ]3 L" D; m; R0 E4 E
- g.fillRect(0, 0, 400, 400);' g j, p, ^% q0 }0 N
- }
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- db = (g) => {//上层绘制
\& W, q0 f" R2 p6 t2 w: o - g.setColor(Color.WHITE);6 j3 [6 v) P3 E* W; M) n# ~6 k
- g.fillRect(0, 0, 400, 400);
4 G# E o7 ^" l3 `. H - g.setColor(Color.RED);
) J% w( S$ b" x1 p+ q - g.setFont(font0);
# x9 }# _- o$ l4 @- f - let str = "晴纱是男娘";* e3 w- A4 }! ~8 F9 b
- let ww = 400;
( N/ x" r% Y% f. E* `- ]" p( h - let w = getW(str, font0);
1 u8 R4 u6 k1 ?) n8 n2 Y/ ]; k - g.drawString(str, ww / 2 - w / 2, 200);( G9 V: C- T. y/ _3 T( \
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- const mat = new Matrices();
+ D! j# X6 y2 ^' U - mat.translate(0, 0.5, 0);
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8 h `9 L+ g) W7 \+ r" e3 C' h- function create(ctx, state, entity) {
& x( t$ v3 q! W) a% z k, F c - let info = {* J \6 e" V0 P7 |* R+ D ~
- ctx: ctx,( h5 u, R+ H! D! v: r' ]
- isTrain: false,# j& G, ]- m3 y' _9 F' n
- matrices: [mat],
% c8 c% N# q" N, l - texture: [400, 400],
. L+ A; o3 H$ Q* b7 a - model: {
6 X+ }% n. M; U1 j5 D/ H+ A- N - renderType: "light",3 r: ?% r i2 N/ H+ b+ Q& G. p) a0 }3 u
- size: [1, 1],
' D7 W8 X6 b8 B; H* G' F - uvSize: [1, 1]* a8 ?! b" n7 M) U+ [
- }
: d1 o6 |* C$ F3 G, S- F - }
4 h$ Y$ C% x, R2 _9 w7 |. ^! F - let f = new Face(info);
. G) I/ ~$ `& i7 n& z. @ - state.f = f;
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- let t = f.texture;5 a, @5 R) J d3 ^
- let g = t.graphics;
0 a+ ?+ G- o s( D: r - state.running = true;6 j, R& D1 X2 ~5 k+ w. h5 j o3 z% k
- let fps = 24;4 N9 f! Q/ d' Z3 K
- da(g);//绘制底图
4 W5 B0 \0 A% A9 V4 d - t.upload();
' S2 f6 D' `% ? S' `5 p! K - let k = 0;2 v3 d; A. h1 g! }' |% }7 p0 u F
- let ti = Date.now();" B/ C- e2 P2 h3 b! [: E" ?
- let rt = 0;
' m( S K& ]% L! |, [ - smooth = (k, v) => {// 平滑变化4 w$ \0 _* J& n
- if (v > k) return k;
6 b" R7 R" d+ K: r6 R: T6 w' K0 n8 ] - if (k < 0) return 0;
2 _$ \0 K3 y2 I" T! S, @) d - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
+ B1 B2 u/ S: U& Q% f - }
* l" o: \2 B0 }8 C; B$ e - run = () => {// 新线程4 e& c' b- N }
- let id = Thread.currentThread().getId();
1 v/ g2 i' Z0 T& _4 C' Y/ M. R8 F - print("Thread start:" + id);
: n, Q( i( S) F- d9 S# z. |! r - while (state.running) {
% L" o/ B: p5 T1 Y5 F6 P3 p: M - try {
7 ~' m6 Y7 h" h' [+ q. q0 n - k += (Date.now() - ti) / 1000 * 0.2;
/ T( e Q, ]& }* Y3 h7 e - ti = Date.now();5 m7 U0 _8 f: r; S
- if (k > 1.5) {
5 J. }' R4 T- s( S# I4 }+ z - k = 0;3 }2 i. C9 ]9 {8 a E1 w! v$ z" L
- }, g# c, D5 C+ X+ }+ N
- setComp(g, 1);. Y- d/ I1 y7 U
- da(g);
( q& u! y7 \8 e- C1 g - let kk = smooth(1, k);//平滑切换透明度
! B, N! A5 M6 w: N& a - setComp(g, kk);
7 t9 j9 z2 f8 z! L: B$ d - db(g);7 A% w+ h: E; l" Z) a# l. h4 @
- t.upload();3 i M! V# B9 V) ]6 a
- ctx.setDebugInfo("rt" ,Date.now() - ti);; K/ I% G' n- y$ y1 X5 d
- ctx.setDebugInfo("k", k);0 L! _, o0 T, G1 B5 h m) {: d
- ctx.setDebugInfo("sm", kk);
' k. a7 Y% |$ R: Y - rt = Date.now() - ti;
4 \& D: T; a- D) X - Thread.sleep(ck(rt - 1000 / fps));: q& Q6 G7 D7 j3 K7 R$ Q$ ?
- ctx.setDebugInfo("error", 0)
) m5 m0 X+ x" \+ m! A Z - } catch (e) {
; ]( |1 ?) ^; o+ o- M m' K( o0 n - ctx.setDebugInfo("error", e);2 n5 b' H s: v: t# [& [
- }3 }' X. A3 V1 n5 v7 p Q2 X
- }
# I, _6 L/ G+ N9 p - print("Thread end:" + id);
% S7 ^& `) e S V- n - }
, ^3 i) f" J d% G7 G7 j - let th = new Thread(run, "qiehuan");
5 k0 h6 G0 ?/ w! K8 s - th.start();6 y: d- |/ r9 E/ v! S
- }7 r0 m5 G: w1 j/ O
- * k2 m2 g9 V/ O8 c2 h* S3 ^5 @
- function render(ctx, state, entity) {
1 |6 F1 \+ X* C) n2 o! Z" D - state.f.tick();. M& [% r% r$ v$ N4 `# o) i- L
- }
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- function dispose(ctx, state, entity) {4 a) L3 C: l$ U' u% T B
- print("Dispose");
( B3 o9 b5 U) w/ ]* a1 N3 @+ A - state.running = false;
. f+ L3 Q/ j. J/ {, V - state.f.close();0 J% H8 }7 {0 N
- }
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- function setComp(g, value) {
7 q; D1 |+ ^/ k4 s, m: G - g.setComposite(AlphaComposite.SrcOver.derive(value));0 Y$ T/ m+ r5 w8 l( v5 d6 X/ S
- }
复制代码 % p6 z% T/ C$ o f2 Z+ l
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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% F* h8 E9 O4 K0 }8 N* o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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