Pileus Git - ~andy/spades/blob - src/org/pileus/spades/Cards.java

   1 package org.pileus.spades;
   2
   3 import java.util.Map;
   4 import java.util.HashMap;
   5
   6 import java.nio.ByteBuffer;
   7 import java.nio.ByteOrder;
   8 import java.nio.FloatBuffer;
   9
  10 import javax.microedition.khronos.egl.EGLConfig;
  11 import javax.microedition.khronos.opengles.GL10;
  12
  13 import android.content.Context;
  14 import android.content.res.Resources;
  15 import android.graphics.Bitmap;
  16 import android.graphics.BitmapFactory;
  17 import android.opengl.GLES20;
  18 import android.opengl.GLSurfaceView;
  19 import android.opengl.GLUtils;
  20 import android.opengl.Matrix;
  21 import android.view.MotionEvent;
  22
  23 public class Cards extends GLSurfaceView implements GLSurfaceView.Renderer
  24 {
  25         /* Shader data */
  26         private final String vertSource
  27                 = "uniform   mat4 u_model;"
  28                 + "uniform   mat4 u_view;"
  29                 + "uniform   mat4 u_proj;"
  30                 + "attribute vec4 a_position;"
  31                 + "attribute vec2 a_mapping;"
  32                 + "varying   vec2 v_mapping;"
  33                 + "void main() {"
  34                 + "  gl_Position = u_proj"
  35                 + "              * u_view"
  36                 + "              * u_model"
  37                 + "              * a_position;"
  38                 + "  v_mapping   = a_mapping;"
  39                 + "}";
  40
  41         private final String fragSource
  42                 = "precision mediump   float;"
  43                 + "uniform   sampler2D u_texture;"
  44                 + "uniform   vec4      u_color;"
  45                 + "varying   vec2      v_mapping;"
  46                 + "void main() {"
  47                 + "  gl_FragColor = texture2D("
  48                 + "    u_texture, v_mapping);"
  49                 + "}";
  50
  51         /* Drawing data */
  52         private final float  faceCoords[] = {
  53                 -0.063f,  0.088f, 0.05f, // Standard poker size:
  54                 -0.063f, -0.088f, 0.05f, //   2.5in x 3.5in
  55                  0.063f, -0.088f, 0.05f, //   63mm  x 88mm
  56                  0.063f,  0.088f, 0.05f, //
  57         };
  58
  59         private final float  backCoords[] = {
  60                  0.063f,  0.088f, 0.05f, // Standard poker size:
  61                  0.063f, -0.088f, 0.05f, //   2.5in x 3.5in
  62                 -0.063f, -0.088f, 0.05f, //   63mm  x 88mm
  63                 -0.063f,  0.088f, 0.05f, //
  64         };
  65
  66         private final float  tableCoords[] = {
  67                 -0.75f,  0.75f, 0,
  68                 -0.75f, -0.75f, 0,
  69                  0.75f, -0.75f, 0,
  70                  0.75f,  0.75f, 0,
  71         };
  72
  73         private final float  mapCoords[] = {
  74                 0.0f, 0.0f,
  75                 0.0f, 1.0f,
  76                 1.0f, 1.0f,
  77                 1.0f, 0.0f,
  78         };
  79
  80         private final float  color[] = {
  81                 1, 0, 0, 1
  82         };
  83
  84         /* Cards data */
  85         private final String cards[] = {
  86                 "As", "Ks", "Qs", "Js", "10s", "9s", "8s", "7s", "6s", "5s", "4s", "3s", "2s",
  87                 "Ah", "Kh", "Qh", "Jh", "10h", "9h", "8h", "7h", "6h", "5h", "4h", "3h", "2h",
  88                 "Ac", "Kc", "Qc", "Jc", "10c", "9c", "8c", "7c", "6c", "5c", "4c", "3c", "2c",
  89                 "Ad", "Kd", "Qd", "Jd", "10d", "9d", "8d", "7d", "6d", "5d", "4d", "3d", "2d",
  90         };
  91
  92         /* Private data */
  93         private Resources    res;         // app resources
  94         private int          program;     // opengl program
  95
  96         private float[]      model;       // model matrix
  97         private float[]      view;        // view matrix
  98         private float[]      proj;        // projection matrix
  99
 100         private FloatBuffer  faceBuf;     // vertex positions for front of card
 101         private FloatBuffer  backBuf;     // vertex positions for back of card
 102         private FloatBuffer  tableBuf;    // vertex positions for table
 103         private FloatBuffer  mapBuf;      // texture mapping coord buffer
 104
 105         private int          modelHandle; // model matrix
 106         private int          viewHandle;  // view matrix
 107         private int          projHandle;  // projection matrix
 108         private int          vertHandle;  // vertex positions
 109         private int          mapHandle;   // texture mapping coords
 110         private int          texHandle;   // texture data
 111         private int          colorHandle; // color data
 112
 113         private int[]        face;        // card face textures
 114         private int          red;         // red card back
 115         private int          blue;        // blue card back
 116         private int          table;       // table top texture
 117
 118         private boolean      drag;        // currently in drag event
 119         private int          pick;        // currently picked card
 120         private float        xpos;        // x drag position (0=left   - 1-right)
 121         private float        ypos;        // y drag position (0=bottom - 1-top)
 122         private float        ylim;        // y limit for a play
 123
 124         private Map<String,Integer> index; // card name to index map
 125
 126         /* Properties */
 127         public String[]      hand;        // cards to display
 128         public String[]      pile;        // played cards to display
 129
 130         /* GLSurfaceView Methods */
 131         public Cards(Context context)
 132         {
 133                 super(context);
 134                 Os.debug("Cards: create");
 135
 136                 this.res   = context.getResources();
 137
 138                 this.model = new float[4*4];
 139                 this.view  = new float[4*4];
 140                 this.proj  = new float[4*4];
 141
 142                 this.face  = new int[52];
 143
 144                 this.ylim  = 0.4f;
 145
 146                 this.hand  = new String[] {
 147                         "As", "7s", "6s",  "6h", "2h", "Ac",
 148                         "Kc", "3c", "10d", "9d", "8d", "7d", "2d"
 149                 };
 150
 151                 this.pile  = new String[] {
 152                         "As", "7s", "6s"
 153                 };
 154
 155                 this.index = new HashMap<String,Integer>(52);
 156                 for (int i = 0; i < 52; i++)
 157                         this.index.put(this.cards[i], i);
 158
 159                 this.setEGLContextClientVersion(2);
 160                 this.setRenderer(this);
 161                 this.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
 162         }
 163
 164         /* Renderer methods */
 165         @Override
 166         public void onSurfaceCreated(GL10 unused, EGLConfig config)
 167         {
 168                 Os.debug("Cards: onSurfaceCreate");
 169
 170                 /* Initialize shaders */
 171                 int vertShader = this.loadShader(GLES20.GL_VERTEX_SHADER,   vertSource);
 172                 int fragShader = this.loadShader(GLES20.GL_FRAGMENT_SHADER, fragSource);
 173
 174                 /* Link shaders into an OpenGL program */
 175                 this.program = GLES20.glCreateProgram();
 176                 GLES20.glAttachShader(program, vertShader);
 177                 GLES20.glAttachShader(program, fragShader);
 178                 GLES20.glLinkProgram(program);
 179
 180                 /* Get shaders attributes */
 181                 this.modelHandle = GLES20.glGetUniformLocation(program, "u_model");
 182                 this.viewHandle  = GLES20.glGetUniformLocation(program, "u_view");
 183                 this.projHandle  = GLES20.glGetUniformLocation(program, "u_proj");
 184                 this.vertHandle  = GLES20.glGetAttribLocation(program, "a_position");
 185                 this.mapHandle   = GLES20.glGetAttribLocation(program, "a_mapping");
 186                 this.texHandle   = GLES20.glGetUniformLocation(program, "u_texture");
 187                 this.colorHandle = GLES20.glGetUniformLocation(program, "u_color");
 188
 189                 /* Create vertex array  */
 190                 this.faceBuf  = this.loadBuffer(this.faceCoords);
 191                 this.backBuf  = this.loadBuffer(this.backCoords);
 192                 this.tableBuf = this.loadBuffer(this.tableCoords);
 193                 this.mapBuf   = this.loadBuffer(this.mapCoords);
 194
 195                 /* Load textures */
 196                 for (int i = 0; i < 52; i++) {
 197                         String name = "card_" + this.cards[i].toLowerCase();
 198                         this.face[i] = this.loadTexture(name);
 199                 }
 200                 this.red   = this.loadTexture("card_red");
 201                 this.blue  = this.loadTexture("card_blue");
 202                 this.table = this.loadTexture("table");
 203
 204                 /* Debug */
 205                 Os.debug("Cards: onSurfaceCreate");
 206         }
 207
 208         @Override
 209         public void onDrawFrame(GL10 unused)
 210         {
 211                 //Os.debug("Cards: onDrawFrame");
 212
 213                 /* Turn on the program */
 214                 GLES20.glUseProgram(program);
 215
 216                 /* Reset view */
 217                 GLES20.glClearColor(0, 0, 0, 1);
 218                 GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
 219
 220                 /* Setup projection matricies */
 221                 GLES20.glUniformMatrix4fv(this.viewHandle, 1, false, this.view, 0);
 222                 GLES20.glUniformMatrix4fv(this.projHandle, 1, false, this.proj, 0);
 223
 224                 /* Setup buffers objects */
 225                 GLES20.glEnableVertexAttribArray(this.vertHandle);
 226                 GLES20.glEnableVertexAttribArray(this.mapHandle);
 227
 228                 /* Setup texturing */
 229                 GLES20.glEnable(GLES20.GL_CULL_FACE);
 230                 GLES20.glEnable(GLES20.GL_BLEND);
 231                 GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA);
 232                 GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
 233                 GLES20.glUniform1i(this.texHandle, 0);
 234
 235                 /* Draw objects */
 236                 this.drawTable();
 237                 this.drawPile();
 238                 this.drawHand();
 239                 this.drawPick();
 240         }
 241
 242         @Override
 243         public void onSurfaceChanged(GL10 unused, int width, int height)
 244         {
 245                 Os.debug("Cards: onSurfaceChanged");
 246
 247                 GLES20.glViewport(0, 0, width, height);
 248
 249                 Matrix.setIdentityM(this.model, 0);
 250                 Matrix.setIdentityM(this.view, 0);
 251                 Matrix.setIdentityM(this.proj, 0);
 252
 253                 // Setup camera
 254                 float xang = 0.5f;
 255                 float yang = xang * ((float)height / (float)width);
 256
 257                 Matrix.frustumM(this.proj, 0,
 258                                 -1E-6f * xang, // left
 259                                 1E-6f  * xang, // right
 260                                 -1E-6f * yang, // bottom
 261                                 1E-6f  * yang, // top
 262                                 1E-6f,         // near
 263                                 10f);          // far
 264
 265                 Matrix.rotateM(this.view, 0, 10f, 1, 0, 0);
 266                 Matrix.translateM(this.view, 0, 0, 0, -1.5f);
 267                 Matrix.rotateM(this.view, 0, -45f, 1, 0, 0);
 268         }
 269
 270         @Override
 271         public boolean onTouchEvent(MotionEvent event)
 272         {
 273                 boolean up = event.getActionMasked() == MotionEvent.ACTION_UP;
 274
 275                 float x =    event.getX() / this.getWidth();
 276                 float y = 1-(event.getY() / this.getHeight());
 277
 278                 this.ypos = y;
 279                 if (y < this.ylim) {
 280                         int num = this.hand.length;
 281                         this.xpos = x;
 282                         this.pick = (int)Math.floor((x*num));
 283                         if (this.pick <    0) this.pick = 0;
 284                         if (this.pick >= num) this.pick = num-1;
 285                 }
 286                 if (y < this.ylim && !this.drag) {
 287                         //Os.debug("Cards: onTouchEvent - starting drag");
 288                         this.drag = true;
 289                 }
 290                 if (this.drag) {
 291                         //Os.debug("Cards: onTouchEvent - move " + x + "," + y);
 292                         this.requestRender();
 293                 }
 294                 if (y >= this.ylim && this.drag && up) {
 295                         //Os.debug("Cards: onTouchEvent - playing card");
 296                 }
 297                 if (up) {
 298                         //Os.debug("Cards: onTouchEvent - ending drag");
 299                         this.drag = false;
 300                 }
 301                 return true;
 302         }
 303
 304         /* Private loading methods */
 305         private int loadShader(int type, String code)
 306         {
 307                 Os.debug("Cards: loadShader");
 308
 309                 int shader = GLES20.glCreateShader(type);
 310                 GLES20.glShaderSource(shader, code);
 311                 GLES20.glCompileShader(shader);
 312                 return shader;
 313         }
 314
 315         private int loadTexture(String name)
 316         {
 317                 //Os.debug("Cards: loadTexture - " + name);
 318
 319                 final int[] tex = new int[1];
 320
 321                 /* Lookup the resource ID */
 322                 int id = 0;
 323                 try {
 324                         id = R.drawable.class.getField(name).getInt(null);
 325                 } catch(Exception e) {
 326                         Os.debug("Cards: lookup failed for '" + name + "'", e);
 327                         return 0;
 328                 }
 329
 330                 /* Load the bitmap */
 331                 Bitmap bitmap = BitmapFactory.decodeResource(this.res, id);
 332
 333                 /* Copy into OpenGL */
 334                 GLES20.glGenTextures(1, tex, 0);
 335                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, tex[0]);
 336                 GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);
 337                 GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
 338                 GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
 339
 340                 return tex[0];
 341         }
 342
 343         private FloatBuffer loadBuffer(float[] data)
 344         {
 345                 ByteBuffer bytes = ByteBuffer.allocateDirect(data.length * 4);
 346                 bytes.order(ByteOrder.nativeOrder());
 347
 348                 FloatBuffer buf = bytes.asFloatBuffer();
 349                 buf.put(data);
 350                 buf.position(0);
 351
 352                 return buf;
 353         }
 354
 355         /* Private drawing methods */
 356         private void drawTable()
 357         {
 358                 /* Setup view */
 359                 Matrix.setIdentityM(this.model, 0);
 360                 GLES20.glUniformMatrix4fv(this.modelHandle, 1, false, this.model, 0);
 361
 362                 /* Draw table */
 363                 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.tableBuf);
 364                 GLES20.glVertexAttribPointer(this.mapHandle,  2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
 365                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, this.table);
 366                 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
 367         }
 368
 369         private void drawPile()
 370         {
 371                 /* Draw played cards */
 372                 for (int i = 0; i < 4; i++) {
 373                         if (i >= this.pile.length || this.pile[i] == null)
 374                                 continue;
 375
 376                         float ang = i * 90f;
 377
 378                         Matrix.setIdentityM(this.model, 0);
 379
 380                         Matrix.rotateM(this.model, 0, -ang, 0f, 0f, 1f);
 381                         Matrix.translateM(this.model, 0, -0.30f, 0f, 0f);
 382                         Matrix.rotateM(this.model, 0,  ang, 0f, 0f, 1f);
 383                         Matrix.scaleM(this.model, 0, 3f, 3f, 0f);
 384
 385                         this.drawCard(this.pile[i]);
 386                 }
 387         }
 388
 389         private void drawHand()
 390         {
 391                 /* Draw hand */
 392                 int num = this.hand.length;
 393                 for (int i = 0; i < num; i++) {
 394                         if (this.drag && this.ypos >= this.ylim && i == this.pick)
 395                                 continue;
 396
 397                         Matrix.setIdentityM(this.model, 0);
 398
 399                         Matrix.rotateM(this.model, 0, 45f, 1f, 0f, 0f);
 400                         Matrix.translateM(this.model, 0, 0f, -0.3f, 1.20f);
 401
 402                         if (this.drag) {
 403                                 float pct = (float)(i+0.5) / num;
 404                                 float err = this.xpos - pct;
 405                                 float y   = (float)this.ypos / this.ylim;
 406                                 float lim = Math.min(Math.max(y,0),1);
 407                                 float fcn = 0.1f
 408                                         * (float)Math.exp(-10*num*Math.pow(y*err,2))
 409                                         * (1f-(float)Math.pow(1-lim, 2));
 410                                 Matrix.translateM(this.model, 0, 0, fcn, 0);
 411                         }
 412
 413                         float left  = -20f + 20f*(1f/num);
 414                         float right =  54f - 54f*(1f/num);
 415                         float ang   = left + i*(right-left)/num;
 416                         Matrix.rotateM(this.model, 0, ang, 0f, 0f, -1f);
 417                         Matrix.translateM(this.model, 0, 0f, 0.15f, 0f);
 418
 419                         this.drawCard(this.hand[i]);
 420                 }
 421         }
 422
 423         private void drawPick()
 424         {
 425                 /* Draw selected card */
 426                 if (this.drag && this.ypos >= this.ylim) {
 427                         Matrix.setIdentityM(this.model, 0);
 428                         Matrix.rotateM(this.model, 0, 45f, 1f, 0f, 0f);
 429                         Matrix.translateM(this.model, 0, 0f, 0f, 1.20f);
 430                         this.drawCard(this.hand[this.pick]);
 431                 }
 432         }
 433
 434         private void drawCard(String name)
 435         {
 436                 int idx   = this.index.get(name);
 437                 int front = this.face[idx];
 438                 int back  = this.red;
 439
 440                 /* Set model matrix */
 441                 GLES20.glUniformMatrix4fv(this.modelHandle, 1, false, this.model, 0);
 442
 443                 /* Draw front */
 444                 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.faceBuf);
 445                 GLES20.glVertexAttribPointer(this.mapHandle,  2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
 446                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, front);
 447                 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
 448
 449                 /* Draw back */
 450                 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.backBuf);
 451                 GLES20.glVertexAttribPointer(this.mapHandle,  2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
 452                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, back);
 453                 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
 454         }
 455 }