Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1051 | chris | 1 | package com.gebauz.bauzoid.graphics.renderstates; |
| 2 | |||
| 3 | import com.gebauz.bauzoid.app.BauzoidException; |
||
| 4 | import com.gebauz.bauzoid.math.Matrix4; |
||
| 5 | |||
| 6 | /** RenderStates |
||
| 7 | * Manage render states, tracking changes, supporting locking, and applying state switches only if necessary. |
||
| 8 | * Usage example: |
||
| 9 | * renderStates.blending.setBlendingMode(BlendingStates.BlendingMode.MULTIPLY); |
||
| 10 | * // ... set other render states |
||
| 11 | * renderStates.activate(); |
||
| 12 | * // ...render object... |
||
| 13 | * renderStates.deactivate(); |
||
| 14 | * |
||
| 15 | * All Render State Objects have three kinds of internal values: target, current, and default. |
||
| 16 | * |
||
| 17 | * Target values are those set by the user - those are the states the user wishes to set. |
||
| 18 | * |
||
| 19 | * Current values are those that the system is tracking, the current state. Each render state |
||
| 20 | * compares the target with the current value and only performs a state change when they differ |
||
| 21 | * to prevent unnecessary state changes. |
||
| 22 | * |
||
| 23 | * Default values are the base values that are set initially or when calling reset. |
||
| 24 | * |
||
| 25 | */ |
||
| 26 | public class RenderStates |
||
| 27 | { |
||
| 28 | public static final int NUM_TEXTURE_STAGES = 2; |
||
| 29 | public static final int MAX_VERTEX_BUFFER_ID = 8; |
||
| 30 | |||
| 31 | public BlendingStates blending = new BlendingStates(this); |
||
| 32 | public CullingStates culling = new CullingStates(this); |
||
| 33 | public DepthTestStates depthTest = new DepthTestStates(this); |
||
| 34 | public ScissorStates scissor = new ScissorStates(this); |
||
| 35 | |||
| 36 | private TextureStage[] mTextureStages = new TextureStage[NUM_TEXTURE_STAGES]; |
||
| 37 | private boolean mLocked = false; |
||
| 38 | |||
| 39 | public static final int MATRIX_STACK_SIZE = 16; |
||
| 40 | |||
| 41 | //public Matrix4 modelViewProjection; |
||
| 42 | public Matrix4 model = Matrix4.createIdentity(); |
||
| 43 | public Matrix4 view = Matrix4.createIdentity(); |
||
| 44 | public Matrix4 projection = Matrix4.createIdentity(); |
||
| 45 | |||
| 46 | private Matrix4[] mModelStack = new Matrix4[MATRIX_STACK_SIZE]; |
||
| 47 | private Matrix4[] mViewStack = new Matrix4[MATRIX_STACK_SIZE]; |
||
| 48 | private Matrix4[] mProjectionStack = new Matrix4[MATRIX_STACK_SIZE]; |
||
| 49 | |||
| 50 | private int mModelStackCurrentIndex = 0; |
||
| 51 | private int mViewStackCurrentIndex = 0; |
||
| 52 | private int mProjectionStackCurrentIndex = 0; |
||
| 53 | |||
| 54 | /** Constructor. */ |
||
| 55 | public RenderStates() |
||
| 56 | { |
||
| 57 | for (int i = 0; i < NUM_TEXTURE_STAGES; i++) |
||
| 58 | { |
||
| 59 | mTextureStages[i] = new TextureStage(this, i); |
||
| 60 | } |
||
| 61 | |||
| 62 | for (int i = 0; i < MATRIX_STACK_SIZE; i++) |
||
| 63 | { |
||
| 64 | mModelStack[i] = Matrix4.createIdentity(); |
||
| 65 | mViewStack[i] = Matrix4.createIdentity(); |
||
| 66 | mProjectionStack[i] = Matrix4.createIdentity(); |
||
| 67 | } |
||
| 68 | } |
||
| 69 | |||
| 70 | /** Initialize render states. */ |
||
| 71 | public void initialize() throws BauzoidException |
||
| 72 | { |
||
| 73 | blending.initialize(); |
||
| 74 | culling.initialize(); |
||
| 75 | depthTest.initialize(); |
||
| 76 | scissor.initialize(); |
||
| 77 | |||
| 78 | for (int i = 0; i < NUM_TEXTURE_STAGES; i++) |
||
| 79 | { |
||
| 80 | mTextureStages[i].initialize(); |
||
| 81 | } |
||
| 82 | } |
||
| 83 | |||
| 84 | /** Activate renderstates - calls activate(false). */ |
||
| 85 | public void activate() |
||
| 86 | { |
||
| 87 | activate(false); |
||
| 88 | } |
||
| 89 | |||
| 90 | /** Activate render states with force parameter. */ |
||
| 91 | public void activate(boolean force) |
||
| 92 | { |
||
| 93 | blending.activate(force); |
||
| 94 | culling.activate(force); |
||
| 95 | depthTest.activate(force); |
||
| 96 | scissor.activate(force); |
||
| 97 | } |
||
| 98 | |||
| 99 | /** Reset to default values. */ |
||
| 100 | public void reset() |
||
| 101 | { |
||
| 102 | blending.reset(); |
||
| 103 | culling.reset(); |
||
| 104 | depthTest.reset(); |
||
| 105 | scissor.reset(); |
||
| 106 | } |
||
| 107 | |||
| 108 | /** Deactivate render states. */ |
||
| 109 | public void deactivate() |
||
| 110 | { |
||
| 111 | reset(); |
||
| 112 | activate(false); |
||
| 113 | } |
||
| 114 | |||
| 115 | /** Check if the renderstates are locked. */ |
||
| 116 | public boolean isLocked() |
||
| 117 | { |
||
| 118 | return mLocked; |
||
| 119 | } |
||
| 120 | |||
| 121 | /** Lock renderstates. */ |
||
| 122 | public void lock(boolean lock) |
||
| 123 | { |
||
| 124 | mLocked = lock; |
||
| 125 | } |
||
| 126 | |||
| 127 | /** Get a texture stage. */ |
||
| 128 | public final TextureStage getTextureStage(int index) |
||
| 129 | { |
||
| 130 | return mTextureStages[index]; |
||
| 131 | } |
||
| 132 | |||
| 133 | /** Multiply matrices and return the full model-view-projection matrix. */ |
||
| 134 | public final Matrix4 getModelViewProjection() |
||
| 135 | { |
||
| 136 | Matrix4 mvpMatrix = Matrix4.multiply(model, view); |
||
| 137 | mvpMatrix = Matrix4.multiply(mvpMatrix, projection); |
||
| 138 | return mvpMatrix; |
||
| 139 | } |
||
| 140 | |||
| 141 | public final void getModelViewProjection(Matrix4 target) |
||
| 142 | { |
||
| 143 | Matrix4.multiply(target, model, view); |
||
| 144 | Matrix4.multiply(target, target, projection); |
||
| 145 | } |
||
| 146 | |||
| 147 | /** Push current model matrix to stack. */ |
||
| 148 | public final void pushModelMatrix() |
||
| 149 | { |
||
| 150 | if (mModelStackCurrentIndex >= MATRIX_STACK_SIZE) |
||
| 151 | return; |
||
| 152 | |||
| 153 | // Create copy so that calling code can work on a different matrix without affecting anything |
||
| 154 | mModelStack[mModelStackCurrentIndex].copyFrom(model); |
||
| 155 | mModelStackCurrentIndex++; |
||
| 156 | } |
||
| 157 | |||
| 158 | /** Pop current model matrix from stack. */ |
||
| 159 | public final void popModelMatrix() |
||
| 160 | { |
||
| 161 | if (mModelStackCurrentIndex <= 0) |
||
| 162 | return; |
||
| 163 | |||
| 164 | mModelStackCurrentIndex--; |
||
| 165 | model.copyFrom(mModelStack[mModelStackCurrentIndex]); |
||
| 166 | } |
||
| 167 | |||
| 168 | /** Push current model matrix to stack. */ |
||
| 169 | public final void pushViewMatrix() |
||
| 170 | { |
||
| 171 | if (mViewStackCurrentIndex >= MATRIX_STACK_SIZE) |
||
| 172 | return; |
||
| 173 | |||
| 174 | mViewStack[mViewStackCurrentIndex].copyFrom(view); |
||
| 175 | mViewStackCurrentIndex++; |
||
| 176 | } |
||
| 177 | |||
| 178 | /** Pop current model matrix from stack. */ |
||
| 179 | public final void popViewMatrix() |
||
| 180 | { |
||
| 181 | if (mViewStackCurrentIndex <= 0) |
||
| 182 | return; |
||
| 183 | |||
| 184 | mViewStackCurrentIndex--; |
||
| 185 | view.copyFrom(mViewStack[mViewStackCurrentIndex]); |
||
| 186 | } |
||
| 187 | |||
| 188 | /** Push current model matrix to stack. */ |
||
| 189 | public final void pushProjectionMatrix() |
||
| 190 | { |
||
| 191 | if (mProjectionStackCurrentIndex >= MATRIX_STACK_SIZE) |
||
| 192 | return; |
||
| 193 | |||
| 194 | mProjectionStack[mProjectionStackCurrentIndex].copyFrom(projection); |
||
| 195 | mProjectionStackCurrentIndex++; |
||
| 196 | } |
||
| 197 | |||
| 198 | /** Pop current model matrix from stack. */ |
||
| 199 | public final void popProjectionMatrix() |
||
| 200 | { |
||
| 201 | if (mProjectionStackCurrentIndex <= 0) |
||
| 202 | return; |
||
| 203 | |||
| 204 | mProjectionStackCurrentIndex--; |
||
| 205 | projection.copyFrom(mProjectionStack[mProjectionStackCurrentIndex]); |
||
| 206 | } |
||
| 207 | |||
| 208 | |||
| 209 | } |
||
| 210 | |||
| 211 | |||
| 212 |