2 * Copyright (c) 2015 Samsung Electronics Co., Ltd.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
19 #include <dali/dali.h>
20 #include <dali/devel-api/rendering/renderer.h>
21 #include <dali-toolkit/dali-toolkit.h>
28 #include "shared/view.h"
34 const char * const APPLICATION_TITLE( "Refraction Effect" );
35 const char * const TOOLBAR_IMAGE( DALI_IMAGE_DIR "top-bar.png" );
36 const char * const CHANGE_TEXTURE_ICON( DALI_IMAGE_DIR "icon-change.png" );
37 const char * const CHANGE_TEXTURE_ICON_SELECTED( DALI_IMAGE_DIR "icon-change-selected.png" );
38 const char * const CHANGE_MESH_ICON( DALI_IMAGE_DIR "icon-replace.png" );
39 const char * const CHANGE_MESH_ICON_SELECTED( DALI_IMAGE_DIR "icon-replace-selected.png" );
41 const char* MESH_FILES[] =
43 DALI_MODEL_DIR "surface_pattern_v01.obj",
44 DALI_MODEL_DIR "surface_pattern_v02.obj"
46 const unsigned int NUM_MESH_FILES( sizeof( MESH_FILES ) / sizeof( MESH_FILES[0] ) );
48 const char* TEXTURE_IMAGES[]=
50 DALI_IMAGE_DIR "background-1.jpg",
51 DALI_IMAGE_DIR "background-2.jpg",
52 DALI_IMAGE_DIR "background-3.jpg",
53 DALI_IMAGE_DIR "background-4.jpg"
55 const unsigned int NUM_TEXTURE_IMAGES( sizeof( TEXTURE_IMAGES ) / sizeof( TEXTURE_IMAGES[0] ) );
57 struct LightOffsetConstraint
59 LightOffsetConstraint( float radius )
64 void operator()( Vector2& current, const PropertyInputContainer& inputs )
66 float spinAngle = inputs[0]->GetFloat();
67 current.x = cos( spinAngle );
68 current.y = sin( spinAngle );
77 * @brief Load an image, scaled-down to no more than the stage dimensions.
79 * Uses image scaling mode SCALE_TO_FILL to resize the image at
80 * load time to cover the entire stage with pixels with no borders,
81 * and filter mode BOX_THEN_LINEAR to sample the image with maximum quality.
83 ResourceImage LoadStageFillingImage( const char * const imagePath )
85 Size stageSize = Stage::GetCurrent().GetSize();
86 return ResourceImage::New( imagePath, ImageDimensions( stageSize.x, stageSize.y ), Dali::FittingMode::SCALE_TO_FILL, Dali::SamplingMode::BOX_THEN_LINEAR );
90 * structure of the vertex in the mesh
101 Vertex( const Vector3& position, const Vector3& normal, const Vector2& textureCoord )
102 : position( position ), normal( normal ), textureCoord( textureCoord )
106 /************************************************************************************************
107 *** The shader source is used when the MeshActor is not touched***
108 ************************************************************************************************/
109 const char* VERTEX_SHADER_FLAT = DALI_COMPOSE_SHADER(
110 attribute mediump vec3 aPosition;\n
111 attribute mediump vec3 aNormal;\n
112 attribute highp vec2 aTexCoord;\n
113 uniform mediump mat4 uMvpMatrix;\n
114 varying mediump vec2 vTexCoord;\n
117 gl_Position = uMvpMatrix * vec4( aPosition.xy, 0.0, 1.0 );\n
118 vTexCoord = aTexCoord.xy;\n
122 const char* FRAGMENT_SHADER_FLAT = DALI_COMPOSE_SHADER(
123 uniform lowp vec4 uColor;\n
124 uniform sampler2D sTexture;\n
125 varying mediump vec2 vTexCoord;\n
128 gl_FragColor = texture2D( sTexture, vTexCoord ) * uColor;\n
132 /************************************************************
133 ** Custom refraction effect shader***************************
134 ************************************************************/
135 const char* VERTEX_SHADER_REFRACTION = DALI_COMPOSE_SHADER(
136 attribute mediump vec3 aPosition;\n
137 attribute mediump vec3 aNormal;\n
138 attribute highp vec2 aTexCoord;\n
139 uniform mediump mat4 uMvpMatrix;\n
140 varying mediump vec4 vVertex;\n
141 varying mediump vec3 vNormal;\n
142 varying mediump vec2 vTexCoord;\n
143 varying mediump vec2 vTextureOffset;\n
146 gl_Position = uMvpMatrix * vec4( aPosition.xy, 0.0, 1.0 );\n
147 vTexCoord = aTexCoord.xy;\n
150 vVertex = vec4( aPosition, 1.0 );\n
151 float length = max(0.01, length(aNormal.xy)) * 40.0;\n
152 vTextureOffset = aNormal.xy / length;\n
156 const char* FRAGMENT_SHADER_REFRACTION = DALI_COMPOSE_SHADER(
157 precision mediump float;\n
158 uniform mediump float uEffectStrength;\n
159 uniform mediump vec3 uLightPosition;\n
160 uniform mediump vec2 uLightXYOffset;\n
161 uniform mediump vec2 uLightSpinOffset;\n
162 uniform mediump float uLightIntensity;\n
163 uniform lowp vec4 uColor;\n
164 uniform sampler2D sTexture;\n
165 varying mediump vec4 vVertex;\n
166 varying mediump vec3 vNormal;\n
167 varying mediump vec2 vTexCoord;\n
168 varying mediump vec2 vTextureOffset;\n
170 vec3 rgb2hsl(vec3 rgb)\n
172 float epsilon = 1.0e-10;\n
173 vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);\n
174 vec4 P = mix(vec4(rgb.bg, K.wz), vec4(rgb.gb, K.xy), step(rgb.b, rgb.g));\n
175 vec4 Q = mix(vec4(P.xyw, rgb.r), vec4(rgb.r, P.yzx), step(P.x, rgb.r));\n
179 float chroma = Q.x - min(Q.w, Q.y);\n
180 float hue = abs(Q.z + (Q.w-Q.y) / (6.0*chroma+epsilon));\n
182 float lightness = value - chroma*0.5;\n
183 return vec3( hue, chroma/max( 1.0-abs(lightness*2.0-1.0), 1.0e-1 ), lightness );\n
186 vec3 hsl2rgb( vec3 hsl )\n
189 vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);\n
190 vec3 p = abs(fract(hsl.xxx + K.xyz) * 6.0 - K.www);\n
191 vec3 RGB = clamp(p - K.xxx, 0.0, 1.0);\n
193 float chroma = ( 1.0 - abs( hsl.z*2.0-1.0 ) ) * hsl.y;\n
194 return ( RGB - 0.5 ) * chroma + hsl.z;\n
199 vec3 normal = normalize( vNormal);\n
201 vec3 lightPosition = uLightPosition + vec3(uLightXYOffset+uLightSpinOffset, 0.0);\n
202 mediump vec3 vecToLight = normalize( (lightPosition - vVertex.xyz) * 0.01 );\n
203 mediump float spotEffect = pow( max(0.05, vecToLight.z ) - 0.05, 8.0);\n
205 spotEffect = spotEffect * uEffectStrength;\n
206 mediump float lightDiffuse = ( ( dot( vecToLight, normal )-0.75 ) *uLightIntensity ) * spotEffect;\n
208 lowp vec4 color = texture2D( sTexture, vTexCoord + vTextureOffset * spotEffect );\n
209 vec3 lightedColor = hsl2rgb( rgb2hsl(color.rgb) + vec3(0.0,0.0,lightDiffuse) );\n
211 gl_FragColor = vec4( lightedColor, color.a ) * uColor;\n
218 /*************************************************/
219 /*Demo using RefractionEffect*****************/
220 /*************************************************/
221 class RefractionEffectExample : public ConnectionTracker
224 RefractionEffectExample( Application &application )
225 : mApplication( application ),
226 mCurrentTextureId( 1 ),
229 // Connect to the Application's Init signal
230 application.InitSignal().Connect(this, &RefractionEffectExample::Create);
233 ~RefractionEffectExample()
239 // The Init signal is received once (only) during the Application lifetime
240 void Create(Application& application)
242 Stage stage = Stage::GetCurrent();
243 Vector2 stageSize = stage.GetSize();
245 stage.KeyEventSignal().Connect(this, &RefractionEffectExample::OnKeyEvent);
247 // Creates a default view with a default tool bar.
248 // The view is added to the stage.
249 Toolkit::ToolBar toolBar;
250 Toolkit::Control view;
251 mContent = DemoHelper::CreateView( application,
258 // Add a button to change background. (right of toolbar)
259 mChangeTextureButton = Toolkit::PushButton::New();
260 mChangeTextureButton.SetButtonImage( ResourceImage::New( CHANGE_TEXTURE_ICON ) );
261 mChangeTextureButton.SetSelectedImage( ResourceImage::New( CHANGE_TEXTURE_ICON_SELECTED ) );
262 mChangeTextureButton.ClickedSignal().Connect( this, &RefractionEffectExample::OnChangeTexture );
263 toolBar.AddControl( mChangeTextureButton,
264 DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage,
265 Toolkit::Alignment::HorizontalRight,
266 DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
267 // Add a button to change mesh pattern. ( left of bar )
268 mChangeMeshButton = Toolkit::PushButton::New();
269 mChangeMeshButton.SetButtonImage( ResourceImage::New( CHANGE_MESH_ICON ) );
270 mChangeMeshButton.SetSelectedImage( ResourceImage::New( CHANGE_MESH_ICON_SELECTED ) );
271 mChangeMeshButton.ClickedSignal().Connect( this, &RefractionEffectExample::OnChangeMesh );
272 toolBar.AddControl( mChangeMeshButton,
273 DemoHelper::DEFAULT_VIEW_STYLE.mToolBarButtonPercentage,
274 Toolkit::Alignment::HorizontalLeft,
275 DemoHelper::DEFAULT_MODE_SWITCH_PADDING );
279 // shader used when the screen is not touched, render a flat surface
280 mShaderFlat = Shader::New( VERTEX_SHADER_FLAT, FRAGMENT_SHADER_FLAT );
281 mGeometry = CreateGeometry( MESH_FILES[mCurrentMeshId] );
283 Image texture = LoadStageFillingImage( TEXTURE_IMAGES[mCurrentTextureId] );
284 mSampler = Sampler::New( texture, "sTexture" );
285 mMaterial = Material::New( mShaderFlat );
286 mMaterial.AddSampler( mSampler );
288 mRenderer = Renderer::New( mGeometry, mMaterial );
290 mMeshActor = Actor::New();
291 mMeshActor.AddRenderer( mRenderer );
292 mMeshActor.SetSize( stageSize );
293 mMeshActor.SetParentOrigin(ParentOrigin::CENTER);
294 mContent.Add( mMeshActor );
296 // Connect the callback to the touch signal on the mesh actor
297 mContent.TouchedSignal().Connect( this, &RefractionEffectExample::OnTouch );
299 // shader used when the finger is touching the screen. render refraction effect
300 mShaderRefraction = Shader::New( VERTEX_SHADER_REFRACTION, FRAGMENT_SHADER_REFRACTION );
303 mLightXYOffsetIndex = mMeshActor.RegisterProperty( "uLightXYOffset", Vector2::ZERO );
305 mLightIntensityIndex = mMeshActor.RegisterProperty( "uLightIntensity", 2.5f );
307 mEffectStrengthIndex = mMeshActor.RegisterProperty( "uEffectStrength", 0.f );
309 Vector3 lightPosition( -stageSize.x*0.5f, -stageSize.y*0.5f, stageSize.x*0.5f ); // top_left
310 mMeshActor.RegisterProperty( "uLightPosition", lightPosition );
312 Property::Index lightSpinOffsetIndex = mMeshActor.RegisterProperty( "uLightSpinOffset", Vector2::ZERO );
314 mSpinAngleIndex = mMeshActor.RegisterProperty("uSpinAngle", 0.f );
315 Constraint constraint = Constraint::New<Vector2>( mMeshActor, lightSpinOffsetIndex, LightOffsetConstraint(stageSize.x*0.1f) );
316 constraint.AddSource( LocalSource(mSpinAngleIndex) );
319 // the animation which spin the light around the finger touch position
320 mLightAnimation = Animation::New(2.f);
321 mLightAnimation.AnimateTo( Property( mMeshActor, mSpinAngleIndex ), Math::PI*2.f );
322 mLightAnimation.SetLooping( true );
323 mLightAnimation.Pause();
326 void SetLightXYOffset( const Vector2& offset )
328 mMeshActor.SetProperty( mLightXYOffsetIndex, offset );
332 * Create a mesh actor with different geometry to replace the current one
334 bool OnChangeMesh( Toolkit::Button button )
336 mCurrentMeshId = ( mCurrentMeshId + 1 ) % NUM_MESH_FILES;
337 mGeometry = CreateGeometry( MESH_FILES[mCurrentMeshId] );
338 mRenderer.SetGeometry( mGeometry );
343 bool OnChangeTexture( Toolkit::Button button )
345 mCurrentTextureId = ( mCurrentTextureId + 1 ) % NUM_TEXTURE_IMAGES;
346 Image texture = LoadStageFillingImage( TEXTURE_IMAGES[mCurrentTextureId] );
347 mSampler.SetImage( texture );
351 bool OnTouch( Actor actor , const TouchEvent& event )
353 const TouchPoint &point = event.GetPoint(0);
356 case TouchPoint::Down:
358 mMaterial.SetShader( mShaderRefraction );
360 SetLightXYOffset( point.screen );
362 mLightAnimation.Play();
364 if( mStrenghAnimation )
366 mStrenghAnimation.Clear();
369 mStrenghAnimation= Animation::New(0.5f);
370 mStrenghAnimation.AnimateTo( Property( mMeshActor, mEffectStrengthIndex ), 1.f );
371 mStrenghAnimation.Play();
375 case TouchPoint::Motion:
377 // make the light position following the finger movement
378 SetLightXYOffset( point.screen );
382 case TouchPoint::Leave:
383 case TouchPoint::Interrupted:
385 mLightAnimation.Pause();
387 if( mStrenghAnimation )
389 mStrenghAnimation.Clear();
391 mStrenghAnimation = Animation::New(0.5f);
392 mStrenghAnimation.AnimateTo( Property( mMeshActor, mEffectStrengthIndex ), 0.f );
393 mStrenghAnimation.FinishedSignal().Connect( this, &RefractionEffectExample::OnTouchFinished );
394 mStrenghAnimation.Play();
397 case TouchPoint::Stationary:
398 case TouchPoint::Last:
408 void OnTouchFinished( Animation& source )
410 mMaterial.SetShader( mShaderFlat );
411 SetLightXYOffset( Vector2::ZERO );
414 Geometry CreateGeometry(const std::string& objFileName)
416 std::vector<Vector3> vertexPositions;
417 Vector<unsigned int> faceIndices;
418 Vector<float> boundingBox;
419 // read the vertice and faces from the .obj file, and record the bounding box
420 ReadObjFile( objFileName, boundingBox, vertexPositions, faceIndices );
422 std::vector<Vector2> textureCoordinates;
423 // align the mesh, scale it to fit the screen size, and calculate the texture coordinate for each vertex
424 ShapeResizeAndTexureCoordinateCalculation( boundingBox, vertexPositions, textureCoordinates );
426 // re-organize the mesh, the vertices are duplicated, each vertex only belongs to one triangle.
427 // Without sharing vertex between triangle, so we can manipulate the texture offset on each triangle conveniently.
428 std::vector<Vertex> vertices;
430 std::size_t size = faceIndices.Size();
431 vertices.reserve( size );
433 for( std::size_t i=0; i<size; i=i+3 )
435 Vector3 edge1 = vertexPositions[ faceIndices[i+2] ] - vertexPositions[ faceIndices[i] ];
436 Vector3 edge2 = vertexPositions[ faceIndices[i+1] ] - vertexPositions[ faceIndices[i] ];
437 Vector3 normal = edge1.Cross(edge2);
440 // make sure all the faces are front-facing
443 vertices.push_back( Vertex( vertexPositions[ faceIndices[i] ], normal, textureCoordinates[ faceIndices[i] ] ) );
444 vertices.push_back( Vertex( vertexPositions[ faceIndices[i+1] ], normal, textureCoordinates[ faceIndices[i+1] ] ) );
445 vertices.push_back( Vertex( vertexPositions[ faceIndices[i+2] ], normal, textureCoordinates[ faceIndices[i+2] ] ) );
450 vertices.push_back( Vertex( vertexPositions[ faceIndices[i] ], normal, textureCoordinates[ faceIndices[i] ] ) );
451 vertices.push_back( Vertex( vertexPositions[ faceIndices[i+2] ], normal, textureCoordinates[ faceIndices[i+2] ] ) );
452 vertices.push_back( Vertex( vertexPositions[ faceIndices[i+1] ], normal, textureCoordinates[ faceIndices[i+1] ] ) );
456 Property::Map vertexFormat;
457 vertexFormat["aPosition"] = Property::VECTOR3;
458 vertexFormat["aNormal"] = Property::VECTOR3;
459 vertexFormat["aTexCoord"] = Property::VECTOR2;
460 PropertyBuffer surfaceVertices = PropertyBuffer::New( vertexFormat, vertices.size() );
461 surfaceVertices.SetData( &vertices[0] );
463 Geometry surface = Geometry::New();
464 surface.AddVertexBuffer( surfaceVertices );
469 void ReadObjFile( const std::string& objFileName,
470 Vector<float>& boundingBox,
471 std::vector<Vector3>& vertexPositions,
472 Vector<unsigned int>& faceIndices)
474 std::ifstream ifs( objFileName.c_str(), std::ios::in );
476 boundingBox.Resize( 6 );
477 boundingBox[0]=boundingBox[2]=boundingBox[4] = std::numeric_limits<float>::max();
478 boundingBox[1]=boundingBox[3]=boundingBox[5] = -std::numeric_limits<float>::max();
481 while( std::getline( ifs, line ) )
483 if( line[0] == 'v' && std::isspace(line[1])) // vertex
485 std::istringstream iss(line.substr(2), std::istringstream::in);
488 while( iss >> vertex[i++] && i < 3);
489 if( vertex.x < boundingBox[0] ) boundingBox[0] = vertex.x;
490 if( vertex.x > boundingBox[1] ) boundingBox[1] = vertex.x;
491 if( vertex.y < boundingBox[2] ) boundingBox[2] = vertex.y;
492 if( vertex.y > boundingBox[3] ) boundingBox[3] = vertex.y;
493 if( vertex.z < boundingBox[4] ) boundingBox[4] = vertex.z;
494 if( vertex.z > boundingBox[5] ) boundingBox[5] = vertex.z;
495 vertexPositions.push_back( vertex );
497 else if( line[0] == 'f' ) //face
499 unsigned int numOfInt = 3;
502 std::size_t found = line.find('/');
503 if( found == std::string::npos )
511 std::istringstream iss(line.substr(2), std::istringstream::in);
512 unsigned int indices[ numOfInt ];
514 while( iss >> indices[i++] && i < numOfInt);
515 unsigned int step = (i+1) / 3;
516 faceIndices.PushBack( indices[0]-1 );
517 faceIndices.PushBack( indices[step]-1 );
518 faceIndices.PushBack( indices[2*step]-1 );
525 void ShapeResizeAndTexureCoordinateCalculation( const Vector<float>& boundingBox,
526 std::vector<Vector3>& vertexPositions,
527 std::vector<Vector2>& textureCoordinates)
529 Vector3 bBoxSize( boundingBox[1] - boundingBox[0], boundingBox[3] - boundingBox[2], boundingBox[5] - boundingBox[4]);
530 Vector3 bBoxMinCorner( boundingBox[0], boundingBox[2], boundingBox[4] );
532 Vector2 stageSize = Stage::GetCurrent().GetSize();
533 Vector3 scale( stageSize.x / bBoxSize.x, stageSize.y / bBoxSize.y, 1.f );
534 scale.z = (scale.x + scale.y)/2.f;
536 textureCoordinates.reserve(vertexPositions.size());
538 for( std::vector<Vector3>::iterator iter = vertexPositions.begin(); iter != vertexPositions.end(); iter++ )
540 Vector3 newPosition( (*iter) - bBoxMinCorner ) ;
542 textureCoordinates.push_back( Vector2( newPosition.x / bBoxSize.x, newPosition.y / bBoxSize.y ) );
544 newPosition -= bBoxSize * 0.5f;
545 (*iter) = newPosition * scale;
550 * Main key event handler
552 void OnKeyEvent(const KeyEvent& event)
554 if(event.state == KeyEvent::Down)
556 if( IsKey( event, Dali::DALI_KEY_ESCAPE) || IsKey( event, Dali::DALI_KEY_BACK) )
565 Application& mApplication;
575 Shader mShaderRefraction;
577 Animation mLightAnimation;
578 Animation mStrenghAnimation;
580 Property::Index mLightXYOffsetIndex;
581 Property::Index mSpinAngleIndex;
582 Property::Index mLightIntensityIndex;
583 Property::Index mEffectStrengthIndex;
585 Toolkit::PushButton mChangeTextureButton;
586 Toolkit::PushButton mChangeMeshButton;
587 unsigned int mCurrentTextureId;
588 unsigned int mCurrentMeshId;
591 /*****************************************************************************/
594 RunTest(Application& app)
596 RefractionEffectExample theApp(app);
600 /*****************************************************************************/
603 main(int argc, char **argv)
605 Application app = Application::New(&argc, &argv, DALI_DEMO_THEME_PATH);