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
 129         /* GLSurfaceView Methods */
 130         public Cards(Context context)
 131         {
 132                 super(context);
 133                 Os.debug("Cards: create");
 134
 135                 this.res   = context.getResources();
 136
 137                 this.model = new float[4*4];
 138                 this.view  = new float[4*4];
 139                 this.proj  = new float[4*4];
 140
 141                 this.face  = new int[52];
 142
 143                 this.ylim  = 0.4f;
 144
 145                 this.hand  = new String[] {
 146                         "As", "7s", "6s",  "6h", "2h", "Ac",
 147                         "Kc", "3c", "10d", "9d", "8d", "7d", "2d"
 148                 };
 149
 150                 this.index = new HashMap<String,Integer>(52);
 151                 for (int i = 0; i < 52; i++)
 152                         this.index.put(this.cards[i], i);
 153
 154                 this.setEGLContextClientVersion(2);
 155                 this.setRenderer(this);
 156                 this.setRenderMode(GLSurfaceView.RENDERMODE_WHEN_DIRTY);
 157         }
 158
 159         /* Renderer methods */
 160         @Override
 161         public void onSurfaceCreated(GL10 unused, EGLConfig config)
 162         {
 163                 Os.debug("Cards: onSurfaceCreate");
 164
 165                 /* Initialize shaders */
 166                 int vertShader = this.loadShader(GLES20.GL_VERTEX_SHADER,   vertSource);
 167                 int fragShader = this.loadShader(GLES20.GL_FRAGMENT_SHADER, fragSource);
 168
 169                 /* Link shaders into an OpenGL program */
 170                 this.program = GLES20.glCreateProgram();
 171                 GLES20.glAttachShader(program, vertShader);
 172                 GLES20.glAttachShader(program, fragShader);
 173                 GLES20.glLinkProgram(program);
 174
 175                 /* Get shaders attributes */
 176                 this.modelHandle = GLES20.glGetUniformLocation(program, "u_model");
 177                 this.viewHandle  = GLES20.glGetUniformLocation(program, "u_view");
 178                 this.projHandle  = GLES20.glGetUniformLocation(program, "u_proj");
 179                 this.vertHandle  = GLES20.glGetAttribLocation(program, "a_position");
 180                 this.mapHandle   = GLES20.glGetAttribLocation(program, "a_mapping");
 181                 this.texHandle   = GLES20.glGetUniformLocation(program, "u_texture");
 182                 this.colorHandle = GLES20.glGetUniformLocation(program, "u_color");
 183
 184                 /* Create vertex array  */
 185                 this.faceBuf  = this.loadBuffer(this.faceCoords);
 186                 this.backBuf  = this.loadBuffer(this.backCoords);
 187                 this.tableBuf = this.loadBuffer(this.tableCoords);
 188                 this.mapBuf   = this.loadBuffer(this.mapCoords);
 189
 190                 /* Load textures */
 191                 for (int i = 0; i < 52; i++) {
 192                         String name = "card_" + this.cards[i].toLowerCase();
 193                         this.face[i] = this.loadTexture(name);
 194                 }
 195                 this.red   = this.loadTexture("card_red");
 196                 this.blue  = this.loadTexture("card_blue");
 197                 this.table = this.loadTexture("table");
 198
 199                 /* Debug */
 200                 Os.debug("Cards: onSurfaceCreate");
 201         }
 202
 203         @Override
 204         public void onDrawFrame(GL10 unused)
 205         {
 206                 Os.debug("Cards: onDrawFrame");
 207
 208                 /* Turn on the program */
 209                 GLES20.glUseProgram(program);
 210
 211                 /* Reset view */
 212                 GLES20.glClearColor(0, 0, 0, 1);
 213                 GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT);
 214
 215                 /* Setup projection matricies */
 216                 GLES20.glUniformMatrix4fv(this.viewHandle, 1, false, this.view, 0);
 217                 GLES20.glUniformMatrix4fv(this.projHandle, 1, false, this.proj, 0);
 218
 219                 /* Setup buffers objects */
 220                 GLES20.glEnableVertexAttribArray(this.vertHandle);
 221                 GLES20.glEnableVertexAttribArray(this.mapHandle);
 222
 223                 /* Setup texturing */
 224                 GLES20.glEnable(GLES20.GL_CULL_FACE);
 225                 GLES20.glEnable(GLES20.GL_BLEND);
 226                 GLES20.glBlendFunc(GLES20.GL_ONE, GLES20.GL_ONE_MINUS_SRC_ALPHA);
 227                 GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
 228                 GLES20.glUniform1i(this.texHandle, 0);
 229
 230                 /* Draw "Table" */
 231                 Matrix.setIdentityM(this.model, 0);
 232                 GLES20.glUniformMatrix4fv(this.modelHandle, 1, false, this.model, 0);
 233                 this.drawTable();
 234
 235                 /* Draw hand */
 236                 int num = this.hand.length;
 237                 for (int i = 0; i < num; i++) {
 238                         if (this.drag && this.ypos >= this.ylim && i == this.pick)
 239                                 continue;
 240
 241                         Matrix.setIdentityM(this.model, 0);
 242
 243                         Matrix.rotateM(this.model, 0, 45f, 1f, 0f, 0f);
 244                         Matrix.translateM(this.model, 0, 0f, -0.3f, 1.20f);
 245
 246                         if (this.drag) {
 247                                 float pct = (float)(i+0.5) / num;
 248                                 float err = this.xpos - pct;
 249                                 float y   = (float)this.ypos / this.ylim;
 250                                 float lim = Math.min(Math.max(y,0),1);
 251                                 float fcn = 0.1f
 252                                         * (float)Math.exp(-10*num*Math.pow(y*err,2))
 253                                         * (1f-(float)Math.pow(1-lim, 2));
 254                                 Matrix.translateM(this.model, 0, 0, fcn, 0);
 255                         }
 256                         float left  = -20f + 20f*(1f/num);
 257                         float right =  54f - 54f*(1f/num);
 258                         float ang   = left + i*(right-left)/num;
 259                         Matrix.rotateM(this.model, 0, ang, 0f, 0f, -1f);
 260                         Matrix.translateM(this.model, 0, 0f, 0.15f, 0f);
 261
 262                         GLES20.glUniformMatrix4fv(this.modelHandle, 1, false, this.model, 0);
 263                         this.drawCard(this.hand[i]);
 264                 }
 265
 266                 /* Draw selected card */
 267                 if (this.drag && this.ypos >= this.ylim) {
 268                         Matrix.setIdentityM(this.model, 0);
 269                         Matrix.rotateM(this.model, 0, 45f, 1f, 0f, 0f);
 270                         Matrix.translateM(this.model, 0, 0f, 0f, 1.20f);
 271                         GLES20.glUniformMatrix4fv(this.modelHandle, 1, false, this.model, 0);
 272                         this.drawCard(this.hand[this.pick]);
 273                 }
 274         }
 275
 276         @Override
 277         public void onSurfaceChanged(GL10 unused, int width, int height)
 278         {
 279                 Os.debug("Cards: onSurfaceChanged");
 280
 281                 GLES20.glViewport(0, 0, width, height);
 282
 283                 Matrix.setIdentityM(this.model, 0);
 284                 Matrix.setIdentityM(this.view, 0);
 285                 Matrix.setIdentityM(this.proj, 0);
 286
 287                 // Setup camera
 288                 float xang = 0.5f;
 289                 float yang = xang * ((float)height / (float)width);
 290
 291                 Matrix.frustumM(this.proj, 0,
 292                                 -1E-6f * xang, // left
 293                                 1E-6f  * xang, // right
 294                                 -1E-6f * yang, // bottom
 295                                 1E-6f  * yang, // top
 296                                 1E-6f,         // near
 297                                 10f);          // far
 298
 299                 Matrix.rotateM(this.view, 0, 10f, 1, 0, 0);
 300                 Matrix.translateM(this.view, 0, 0, 0, -1.5f);
 301                 Matrix.rotateM(this.view, 0, -45f, 1, 0, 0);
 302         }
 303
 304         @Override
 305         public boolean onTouchEvent(MotionEvent event)
 306         {
 307                 boolean up   = event.getActionMasked() == MotionEvent.ACTION_UP;
 308
 309                 float x =    event.getX() / this.getWidth();
 310                 float y = 1-(event.getY() / this.getHeight());
 311
 312                 this.ypos = y;
 313                 if (y < this.ylim) {
 314                         int num = this.hand.length;
 315                         this.xpos = x;
 316                         this.pick = (int)Math.floor((x*num));
 317                         if (this.pick <    0) this.pick = 0;
 318                         if (this.pick >= num) this.pick = num-1;
 319                 }
 320                 if (y < this.ylim && !this.drag) {
 321                         Os.debug("Cards: onTouchEvent - starting drag");
 322                         this.drag = true;
 323                 }
 324                 if (this.drag) {
 325                         Os.debug("Cards: onTouchEvent - move "
 326                                         + x + "," + y);
 327                         this.requestRender();
 328                 }
 329                 if (y >= this.ylim && this.drag && up) {
 330                         Os.debug("Cards: onTouchEvent - playing card");
 331                 }
 332                 if (up) {
 333                         Os.debug("Cards: onTouchEvent - ending drag");
 334                         this.drag = false;
 335                 }
 336                 return true;
 337         }
 338
 339         /* Private loading methods */
 340         private int loadShader(int type, String code)
 341         {
 342                 Os.debug("Cards: loadShader");
 343
 344                 int shader = GLES20.glCreateShader(type);
 345                 GLES20.glShaderSource(shader, code);
 346                 GLES20.glCompileShader(shader);
 347                 return shader;
 348         }
 349
 350         private int loadTexture(String name)
 351         {
 352                 Os.debug("Cards: loadTexture - " + name);
 353
 354                 final int[] tex = new int[1];
 355
 356                 /* Lookup the resource ID */
 357                 int id = 0;
 358                 try {
 359                         id = R.drawable.class.getField(name).getInt(null);
 360                 } catch(Exception e) {
 361                         Os.debug("Cards: lookup failed for '" + name + "'", e);
 362                         return 0;
 363                 }
 364
 365                 /* Load the bitmap */
 366                 Bitmap bitmap = BitmapFactory.decodeResource(this.res, id);
 367
 368                 /* Copy into OpenGL */
 369                 GLES20.glGenTextures(1, tex, 0);
 370                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, tex[0]);
 371                 GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, bitmap, 0);
 372                 GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
 373                 GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_NEAREST);
 374
 375                 return tex[0];
 376         }
 377
 378         private FloatBuffer loadBuffer(float[] data)
 379         {
 380                 ByteBuffer bytes = ByteBuffer.allocateDirect(data.length * 4);
 381                 bytes.order(ByteOrder.nativeOrder());
 382
 383                 FloatBuffer buf = bytes.asFloatBuffer();
 384                 buf.put(data);
 385                 buf.position(0);
 386
 387                 return buf;
 388         }
 389
 390         /* Private drawing methods */
 391         private void drawTable()
 392         {
 393                 /* Draw table */
 394                 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.tableBuf);
 395                 GLES20.glVertexAttribPointer(this.mapHandle,  2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
 396                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, this.table);
 397                 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
 398         }
 399
 400         private void drawCard(String name)
 401         {
 402                 int idx   = this.index.get(name);
 403                 int front = this.face[idx];
 404                 int back  = this.red;
 405
 406                 /* Draw front */
 407                 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.faceBuf);
 408                 GLES20.glVertexAttribPointer(this.mapHandle,  2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
 409                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, front);
 410                 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
 411
 412                 /* Draw back */
 413                 GLES20.glVertexAttribPointer(this.vertHandle, 3, GLES20.GL_FLOAT, false, 3*4, this.backBuf);
 414                 GLES20.glVertexAttribPointer(this.mapHandle,  2, GLES20.GL_FLOAT, false, 2*4, this.mapBuf);
 415                 GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, back);
 416                 GLES20.glDrawArrays(GLES20.GL_TRIANGLE_FAN, 0, 4);
 417         }
 418 }