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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 | #region File Description//-----------------------------------------------------------------------------// DualTextureEffect.cs//// Microsoft XNA Community Game Platform// Copyright (C) Microsoft Corporation. All rights reserved.//-----------------------------------------------------------------------------#endregionnamespace Microsoft.Xna.Framework.Graphics{ /// <summary> /// Built-in effect that supports two-layer multitexturing. /// </summary> public class DualTextureEffect : Effect, IEffectMatrices, IEffectFog { #region Effect Parameters EffectParameter textureParam; EffectParameter texture2Param; EffectParameter diffuseColorParam; EffectParameter fogColorParam; EffectParameter fogVectorParam; EffectParameter worldViewProjParam; EffectParameter shaderIndexParam; #endregion #region Fields bool fogEnabled; bool vertexColorEnabled; Matrix world = Matrix.Identity; Matrix view = Matrix.Identity; Matrix projection = Matrix.Identity; Matrix worldView; Vector3 diffuseColor = Vector3.One; float alpha = 1; float fogStart = 0; float fogEnd = 1; EffectDirtyFlags dirtyFlags = EffectDirtyFlags.All; #endregion #region Public Properties /// <summary> /// Gets or sets the world matrix. /// </summary> public Matrix World { get { return world; } set { world = value; dirtyFlags |= EffectDirtyFlags.WorldViewProj | EffectDirtyFlags.Fog; } } /// <summary> /// Gets or sets the view matrix. /// </summary> public Matrix View { get { return view; } set { view = value; dirtyFlags |= EffectDirtyFlags.WorldViewProj | EffectDirtyFlags.Fog; } } /// <summary> /// Gets or sets the projection matrix. /// </summary> public Matrix Projection { get { return projection; } set { projection = value; dirtyFlags |= EffectDirtyFlags.WorldViewProj; } } /// <summary> /// Gets or sets the material diffuse color (range 0 to 1). /// </summary> public Vector3 DiffuseColor { get { return diffuseColor; } set { diffuseColor = value; dirtyFlags |= EffectDirtyFlags.MaterialColor; } } /// <summary> /// Gets or sets the material alpha. /// </summary> public float Alpha { get { return alpha; } set { alpha = value; dirtyFlags |= EffectDirtyFlags.MaterialColor; } } /// <summary> /// Gets or sets the fog enable flag. /// </summary> public bool FogEnabled { get { return fogEnabled; } set { if (fogEnabled != value) { fogEnabled = value; dirtyFlags |= EffectDirtyFlags.ShaderIndex | EffectDirtyFlags.FogEnable; } } } /// <summary> /// Gets or sets the fog start distance. /// </summary> public float FogStart { get { return fogStart; } set { fogStart = value; dirtyFlags |= EffectDirtyFlags.Fog; } } /// <summary> /// Gets or sets the fog end distance. /// </summary> public float FogEnd { get { return fogEnd; } set { fogEnd = value; dirtyFlags |= EffectDirtyFlags.Fog; } } /// <summary> /// Gets or sets the fog color. /// </summary> public Vector3 FogColor { get { return fogColorParam.GetValueVector3(); } set { fogColorParam.SetValue(value); } } /// <summary> /// Gets or sets the current base texture. /// </summary> public Texture2D Texture { get { return textureParam.GetValueTexture2D(); } set { textureParam.SetValue(value); } } /// <summary> /// Gets or sets the current overlay texture. /// </summary> public Texture2D Texture2 { get { return texture2Param.GetValueTexture2D(); } set { texture2Param.SetValue(value); } } /// <summary> /// Gets or sets whether vertex color is enabled. /// </summary> public bool VertexColorEnabled { get { return vertexColorEnabled; } set { if (vertexColorEnabled != value) { vertexColorEnabled = value; dirtyFlags |= EffectDirtyFlags.ShaderIndex; } } } #endregion #region Methods /// <summary> /// Creates a new DualTextureEffect with default parameter settings. /// </summary> public DualTextureEffect(GraphicsDevice device) : base(device, Resources.DualTextureEffect) { CacheEffectParameters(); } /// <summary> /// Creates a new DualTextureEffect by cloning parameter settings from an existing instance. /// </summary> protected DualTextureEffect(DualTextureEffect cloneSource) : base(cloneSource) { CacheEffectParameters(); fogEnabled = cloneSource.fogEnabled; vertexColorEnabled = cloneSource.vertexColorEnabled; world = cloneSource.world; view = cloneSource.view; projection = cloneSource.projection; diffuseColor = cloneSource.diffuseColor; alpha = cloneSource.alpha; fogStart = cloneSource.fogStart; fogEnd = cloneSource.fogEnd; } /// <summary> /// Creates a clone of the current DualTextureEffect instance. /// </summary> public override Effect Clone() { return new DualTextureEffect(this); } /// <summary> /// Looks up shortcut references to our effect parameters. /// </summary> void CacheEffectParameters() { textureParam = Parameters["Texture"]; texture2Param = Parameters["Texture2"]; diffuseColorParam = Parameters["DiffuseColor"]; fogColorParam = Parameters["FogColor"]; fogVectorParam = Parameters["FogVector"]; worldViewProjParam = Parameters["WorldViewProj"]; shaderIndexParam = Parameters["ShaderIndex"]; } /// <summary> /// Lazily computes derived parameter values immediately before applying the effect. /// </summary> protected internal override void OnApply() { // Recompute the world+view+projection matrix or fog vector? dirtyFlags = EffectHelpers.SetWorldViewProjAndFog(dirtyFlags, ref world, ref view, ref projection, ref worldView, fogEnabled, fogStart, fogEnd, worldViewProjParam, fogVectorParam); // Recompute the diffuse/alpha material color parameter? if ((dirtyFlags & EffectDirtyFlags.MaterialColor) != 0) { diffuseColorParam.SetValue(new Vector4(diffuseColor * alpha, alpha)); dirtyFlags &= ~EffectDirtyFlags.MaterialColor; } // Recompute the shader index? if ((dirtyFlags & EffectDirtyFlags.ShaderIndex) != 0) { int shaderIndex = 0; if (!fogEnabled) shaderIndex += 1; if (vertexColorEnabled) shaderIndex += 2; shaderIndexParam.SetValue(shaderIndex); dirtyFlags &= ~EffectDirtyFlags.ShaderIndex; } } #endregion }} |
