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$ H: s% C1 r5 J& n4 U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。/ [/ {- l% `$ \' ?
- importPackage (java.lang);% t( y }8 L9 i( r
- importPackage (java.awt);# H) ~! b4 s! I2 ~& t9 K
- 2 ?# S7 w7 F' n+ k+ v! C
- include(Resources.id("mtrsteamloco:library/code/face.js"));$ R2 d1 P( k8 @
* m+ q- K) h; T& u: q4 ]- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' \! @( ~! r* V; g( `( ~; r0 F% u
- ; T8 f! I1 M. m- y* m
- function getW(str, font) {. a* {6 k3 M( _: A8 F: O
- let frc = Resources.getFontRenderContext();
! N" b. F2 v4 l- ^ - bounds = font.getStringBounds(str, frc);3 `2 Q5 V, @9 Z
- return Math.ceil(bounds.getWidth());% [$ J, ?7 }+ Z# j0 ], A
- }
7 D7 Z& _+ {$ U4 Q4 n
0 L6 E0 V0 Q4 X2 q; U, X! `- da = (g) => {//底图绘制
$ x0 r# w5 Z4 a- Q& g - g.setColor(Color.BLACK);
% i" O: o/ M" \- I \ - g.fillRect(0, 0, 400, 400);+ F5 ^0 v/ t9 K" n5 J2 ^( O
- }
' {* W1 D2 ]2 I9 e - 6 G$ v. B5 s; K3 d8 \8 j& c
- db = (g) => {//上层绘制' h* h# |' ]2 N
- g.setColor(Color.WHITE);
m( B2 R$ D$ @( m - g.fillRect(0, 0, 400, 400);
" j- \' O/ a/ J3 A9 g8 B - g.setColor(Color.RED);; l1 @$ N* n, S: E$ ^8 U' H
- g.setFont(font0);
+ S( _0 U: R: B7 ^1 T6 p - let str = "晴纱是男娘";, z1 I5 ?. |& \8 x; K9 s4 a
- let ww = 400;3 M0 a2 r: g6 \# a% b: h3 X
- let w = getW(str, font0);
, T7 |$ q0 c7 j, e H! ]* E3 P3 W - g.drawString(str, ww / 2 - w / 2, 200); _; s Q; W# x
- }/ |2 H: ]# W/ u6 |4 m
+ s, K- L7 f9 ]3 M4 W- const mat = new Matrices();
/ v9 f/ `5 w3 d" k8 L - mat.translate(0, 0.5, 0);+ P8 z4 x( k- B/ H
- e: Q/ f* t% z- function create(ctx, state, entity) {
# i1 V) t- ^+ a! _7 l - let info = {
& @$ H7 Q4 h8 O: r- h - ctx: ctx,
0 i' D$ B! Y5 ~' C/ M5 t - isTrain: false,
* \0 L( ]1 }/ V, |+ S - matrices: [mat],
! Q& e* E* |3 Q - texture: [400, 400],
1 G$ N3 t8 O$ J3 k! n9 N - model: {
& |/ ~; U8 I; l/ x- Q8 l' s- y8 h - renderType: "light",# ]& T% T5 P( f3 F/ f) X; o
- size: [1, 1],% H2 x3 _$ _& P* h9 U) H1 p& A
- uvSize: [1, 1]
4 t1 ^7 X+ O4 P; [ - }: N# E. v3 J% j9 @) l
- }
( d) L0 B6 I2 K3 a( X3 w - let f = new Face(info);
8 G! t) B' Y4 |& N1 f" r - state.f = f;5 l+ Q$ Y( E" f* s
- : l1 \/ g) ]. d* d' ?# v
- let t = f.texture;
( p/ J2 [: G# c; a" J - let g = t.graphics;
Q5 l- b2 [; d; z8 E" P - state.running = true;1 R6 w2 S, x6 Y5 }; j) N# n) X$ X
- let fps = 24;1 r4 f7 S3 A" j; U! q+ X- R- v
- da(g);//绘制底图$ E! \4 c& Y( u* z3 r6 G8 @
- t.upload();7 I5 B3 [5 U1 {; i+ S6 G6 \
- let k = 0;5 c8 Z w7 k5 b! T8 T
- let ti = Date.now();& Y4 K' p! {) z* S: N) o- I4 ~: C
- let rt = 0;
9 l e# Y% V7 ?! O( B2 ? - smooth = (k, v) => {// 平滑变化
9 x2 ~3 W2 f i9 \$ z2 M - if (v > k) return k;
w* ?+ R3 _. {: C5 o7 ~9 ^ - if (k < 0) return 0;4 `5 v+ _/ \8 D F* a+ K$ t# f
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, [" g1 o7 I1 C+ a1 z* _
- }, y# F, Y) n# ^4 K W% C2 `
- run = () => {// 新线程
9 q* b" v3 m" ^, Q) T - let id = Thread.currentThread().getId();' G2 {5 } p1 S4 t3 f: o
- print("Thread start:" + id);- Q! C8 a/ W6 l* F: b! J1 Q
- while (state.running) {5 ^% _) P( r2 _7 K
- try {
5 `, c, Q9 }( C1 p - k += (Date.now() - ti) / 1000 * 0.2;
; ~4 j) z4 a: U8 G, o8 p8 Q. L# ] - ti = Date.now();
) g. r" j5 ^$ D5 A - if (k > 1.5) {
6 }' R) }2 L- P+ L- k - k = 0;! P& T$ u2 H! P, y/ g6 R" S
- }# X- H; ^) X3 f/ k1 k
- setComp(g, 1);
& u- D5 C" l& a4 W" I7 Q* Z: z - da(g);1 C2 i" w. I# Q8 A# t
- let kk = smooth(1, k);//平滑切换透明度
' s h% p4 t6 ]: } - setComp(g, kk);* N: R1 i" {8 s- p$ H% A7 E
- db(g);
: `4 `% u" O, l7 ~+ G0 y - t.upload();( v( C9 m- X: v. W
- ctx.setDebugInfo("rt" ,Date.now() - ti);
+ d* [3 z2 j5 S! w - ctx.setDebugInfo("k", k);$ I& O2 I& N; F) s( c1 C' a
- ctx.setDebugInfo("sm", kk);+ L$ o C* s7 m6 f* i+ K0 h
- rt = Date.now() - ti;
, j. ~+ P* `1 u$ W( S! {- G4 C3 B( h - Thread.sleep(ck(rt - 1000 / fps));+ v+ ]" f, b& B: M, p
- ctx.setDebugInfo("error", 0)! m4 g7 G) X1 q0 O. E. h' {8 V5 j1 A$ j
- } catch (e) {5 l/ B; o( \$ N! u# p7 u
- ctx.setDebugInfo("error", e);
3 h$ {# C9 |4 g/ y - }# T4 s4 ^5 f7 ^$ X: H
- } G5 O" ]7 x! P- i* c9 q
- print("Thread end:" + id);4 \; Z7 W* X2 F4 V$ d
- }. |+ V% w `8 ?. T( _- n
- let th = new Thread(run, "qiehuan");
* w$ S/ g& {; L - th.start();+ i% R; L/ ?- \6 H" ~
- }" c6 ~% |- |8 w8 D( d" K) X {9 `/ Y* M
- 1 r9 N8 n2 ]. g2 i9 w! l
- function render(ctx, state, entity) {
( k; R7 i) x* H+ @( V; B - state.f.tick();
7 e$ S1 b( M' ^4 h - }- U/ ? c9 e/ ^. Y: i3 o
- i. y# Y, X# M% x- function dispose(ctx, state, entity) {
" v; @( X% e& T+ @# o" _+ J3 V - print("Dispose");, U/ _8 f/ ~; i- z, r% }2 U
- state.running = false;
$ S0 r4 }8 _. |# r: S5 T7 K - state.f.close();; H. f2 v1 L+ Z' W: K+ P3 m+ G
- }4 R& C2 e8 Y1 W
9 Z; f6 }5 Q; w) W! s- function setComp(g, value) {
' [3 H. s$ I/ p0 `4 k$ m - g.setComposite(AlphaComposite.SrcOver.derive(value));' ~! \+ y2 t. n) J) C, w
- }
复制代码
% J( [* `# C" G* y- 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。" j7 O$ p, V. T4 ?9 L
) { j3 D3 Y' ^; u, w9 p, b
4 D0 P- i6 X- _6 `* e# c) M顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# Y, K* \6 {. @& w1 [2 n2 `
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