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$ W5 R9 H! P3 B$ m+ h0 z' @+ ~- L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。0 K2 C8 Z/ e5 ^# j7 }0 n. l
- importPackage (java.lang);
8 P4 {' r+ Y1 q/ o9 h - importPackage (java.awt);
. |- n5 F4 T# h$ e) i! {6 w
- t+ ]$ Q3 k+ \; o! L$ m- include(Resources.id("mtrsteamloco:library/code/face.js"));
% J# x/ g* b4 M9 M7 u7 K
; h5 V& C e1 L5 Y0 a N- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
% W. P$ J+ w: Q5 s" \1 ]6 N( j; T
6 r; p' b: h. _# M9 w; A- function getW(str, font) {
) b* U, @) n% S- x/ i: q - let frc = Resources.getFontRenderContext();
: [# b1 N& R9 I. s+ @/ V - bounds = font.getStringBounds(str, frc);
P- [ h2 @9 ^# V+ j) N! z - return Math.ceil(bounds.getWidth());5 E4 P! P& K: T) |, f; N
- }
+ m h, e/ v6 Z0 \
6 E! Q& T* E, z1 l* h3 d @/ S- da = (g) => {//底图绘制
8 q& }4 \$ O9 F$ G# G: u - g.setColor(Color.BLACK);
; A; c" s* j% s7 j3 m" H - g.fillRect(0, 0, 400, 400);
/ q1 s9 D& G! |) H% H2 x - }
' I: y6 B2 Y% `
9 D1 Q# R% Z- @5 u, M- db = (g) => {//上层绘制
* J& D7 d9 }, b! P) U5 E7 U! I - g.setColor(Color.WHITE);
% y5 |, a, s9 P: k - g.fillRect(0, 0, 400, 400);' }$ g& k1 O0 ?
- g.setColor(Color.RED);
9 l- I( o2 K3 M% V9 O - g.setFont(font0);
5 X; a- m. f4 A1 w8 ^' I H/ s - let str = "晴纱是男娘";5 a% H6 _% |+ E/ X- e# x$ `
- let ww = 400;
" i. a+ _2 y& R) S - let w = getW(str, font0);. H+ y& w6 y, f* J9 U
- g.drawString(str, ww / 2 - w / 2, 200);- g- }/ Q7 l' N" q1 b' O
- }8 r* r" B0 m1 z3 ?$ ], ~
& S' x9 Y) ^0 s& A% X# Z- const mat = new Matrices();
, M/ {& g) P' P n - mat.translate(0, 0.5, 0);
. q i, V$ n X - ! D4 }" \7 n- Z& r6 ^
- function create(ctx, state, entity) {
9 H! L& U9 f' z: c - let info = {5 [1 P& R4 v, ? I
- ctx: ctx,
2 F! `- I! j- x0 A. X) Y - isTrain: false,- a, e {1 v& |& l" N$ ]& w
- matrices: [mat],
/ U: l! }' l4 {2 | - texture: [400, 400],+ R( R( a6 v% \0 p0 w
- model: {
9 T# P! J8 i- r) J7 i - renderType: "light",
. j% H5 _- _! K, u+ {3 g( \' r - size: [1, 1],1 l1 V5 W0 L$ Y+ E( |* n8 g
- uvSize: [1, 1] X) i6 d- n3 W, v1 ?
- }4 f! l7 l8 Z1 W4 x w
- }# e) y, G. h1 l9 E8 v
- let f = new Face(info);( E) n) a! y$ Z$ ]& d
- state.f = f;: b, L& f* d& B- _- K8 Y. M# \4 B
- . x0 G+ ~$ [4 G$ T
- let t = f.texture;- D7 P/ ^1 N: G- ^, q) I$ o
- let g = t.graphics;) S4 N. V! J3 W, c7 o
- state.running = true;! |3 i( ^0 Y8 @& H9 L9 J1 w
- let fps = 24;
3 x& j/ B& V" T9 r# m Z - da(g);//绘制底图
1 k" D* ?& R% M" X/ ^ - t.upload();
% v9 C6 U; m7 K3 s* `- H: {8 L: V - let k = 0;
- u- A ]1 v' G. D! O0 A) Z - let ti = Date.now();
# G2 l% `5 l, u5 q - let rt = 0;
0 v* p2 k3 M* {) f% j7 F - smooth = (k, v) => {// 平滑变化
0 i6 v- x5 P' j( L. _6 x9 j - if (v > k) return k;
/ |( R0 k7 i4 O$ |# D; o - if (k < 0) return 0;
4 T) u* w7 m6 S- j( x* U+ P7 B - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 y6 i% |% N) ^# N
- }
5 a+ `& }: F; H: |- d6 j U - run = () => {// 新线程
$ s3 j$ {# q( g% ]/ I - let id = Thread.currentThread().getId(); b) r7 v+ m) ^4 Y
- print("Thread start:" + id);# ]3 r6 J# |4 F6 S
- while (state.running) {
" u- Z3 [$ L8 q1 N' F0 A' a - try {4 A+ }- s- `# N+ \0 {
- k += (Date.now() - ti) / 1000 * 0.2;/ {1 r5 v. g+ \+ o5 T
- ti = Date.now();- h5 A3 O% u$ J% R9 X' T- L3 X3 r- Y
- if (k > 1.5) {
6 u# E$ M; p9 u# g& Y' e" M - k = 0;
4 e9 j- H3 ^0 Q- m. L7 [; a" `8 K - }
' d/ N! a& T! U* U - setComp(g, 1);
5 {+ w4 T! ^, W - da(g);
5 J- f: v! ^! ]3 h' x! h - let kk = smooth(1, k);//平滑切换透明度
# I$ @/ X9 a4 S' ^ - setComp(g, kk);
. I) t, m& X/ m: r) m% O% [2 q - db(g);
. W) s; D0 N2 \' [- ^ - t.upload();
' H, b/ J+ T; J8 U - ctx.setDebugInfo("rt" ,Date.now() - ti);
7 u3 D1 x0 y p$ Y9 X - ctx.setDebugInfo("k", k);# P# _- }' Y. Q
- ctx.setDebugInfo("sm", kk);$ V) U$ Y( Z" L9 Q
- rt = Date.now() - ti;
$ l2 H' }) _- R; ]$ K - Thread.sleep(ck(rt - 1000 / fps));
0 g" {4 x0 i0 @ k/ L! h! y - ctx.setDebugInfo("error", 0)0 s8 E! w- s9 u) e! D( W
- } catch (e) {' h& Y- ^8 V Z* {
- ctx.setDebugInfo("error", e);% N4 T: v5 m* g# q, W6 c
- }6 ~( \- g' C9 K: v% X- g3 ]
- }
3 _8 ]- N2 R1 X$ @ - print("Thread end:" + id);- b8 n3 }, B5 q& R9 m9 K# \5 K
- }
5 L7 O1 O* x! n7 t& S1 [ - let th = new Thread(run, "qiehuan");+ t0 H$ t3 a: w' I" h( s
- th.start();
$ [$ n1 S+ E0 |+ V3 Y - } {- f& H& I+ O0 s: ^9 ]" H8 Y6 j
- 0 K O, A q3 P3 f+ k, @
- function render(ctx, state, entity) {. f7 p+ n+ F$ N( o" S, X$ M
- state.f.tick();
. d5 e1 k0 Y; x+ W - }5 V9 G* x! V& r2 b4 _, C! ~
- # L& x# a/ y' R" N. ~; Q6 h& s
- function dispose(ctx, state, entity) {
: v3 c9 u7 L& P" Q+ ] - print("Dispose");
9 X! `& x. M' _3 v9 O. Q* L - state.running = false;9 a2 n' F/ _2 c) M: w9 T
- state.f.close();
: m9 f! O) z- t/ f8 f* p3 B- v, ^4 I - }
X" n8 E7 H5 C. k0 X - 5 P0 L9 [. E- y1 N" Y
- function setComp(g, value) {5 F' J) _/ [0 q$ d+ z
- g.setComposite(AlphaComposite.SrcOver.derive(value));) t6 n' C( T) W1 R
- }
复制代码
+ z; B& N9 s7 Z! u9 s) n! Z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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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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