dali-toolkit/internal/controls/scrollable/bouncing-effect-actor.cpp

   1 /*
   2  * Copyright (c) 2016 Samsung Electronics Co., Ltd.
   3  *
   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
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  *
  16  */
  17
  18 // CLASS HEADER
  19 #include <dali-toolkit/internal/controls/scrollable/bouncing-effect-actor.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali/public-api/math/vector3.h>
  23 #include <dali/public-api/object/property-map.h>
  24 #include <dali/public-api/rendering/geometry.h>
  25 #include <dali/public-api/rendering/renderer.h>
  26 #include <dali/public-api/rendering/shader.h>
  27 #include <dali/public-api/rendering/texture-set.h>
  28
  29 // INTERNAL INCLUDES
  30 #include <dali-toolkit/internal/graphics/builtin-shader-extern-gen.h>
  31
  32 namespace Dali
  33 {
  34
  35 namespace Toolkit
  36 {
  37
  38 namespace Internal
  39 {
  40
  41 namespace
  42 {
  43 // Bouncing effect is presented by stacked three layers with same color and opacity
  44 const float LAYER_HEIGHTS[5] =
  45 {
  46   1.f,
  47   26.f * 4.f/ 130.f,
  48   26.f * 3.f / 130.f,
  49   26.f * 2.f / 130.f,
  50   26.f / 130.f
  51 };
  52
  53 } // namespace Anon
  54
  55 Actor CreateBouncingEffectActor( Property::Index& bouncePropertyIndex )
  56 {
  57   // Create the bouncing mesh geometry
  58   struct VertexPosition
  59   {
  60     Vector3 position1;
  61     Vector3 position2;
  62   };
  63   // 4 vertices 2 triangles per layer. The depth interval between each layer is 0.01
  64   VertexPosition vertexData[20] = {
  65     // bottom layer
  66     { Vector3( -0.5f, -0.5f, 0.f ),  Vector3( -0.5f, -0.5f, 0.f )  },
  67     { Vector3( 0.5f, -0.5f, 0.f ),   Vector3( 0.5f, -0.5f, 0.f )   },
  68     { Vector3( -0.5f, -0.5f, 0.f ),  Vector3( -0.5f, -0.5f + LAYER_HEIGHTS[0], 0.f ) },
  69     { Vector3( 0.5f, -0.5f, 0.f ),   Vector3( 0.5f, -0.5f+ LAYER_HEIGHTS[0], 0.f )   },
  70     // mid-bottom layer
  71     { Vector3( -0.5f, -0.5f, 0.01f ),  Vector3( -0.5f, -0.5f, 0.01f )  },
  72     { Vector3( 0.5f, -0.5f, 0.01f ),   Vector3( 0.5f, -0.5f, 0.01f )   },
  73     { Vector3( -0.5f, -0.5f, 0.01f ),  Vector3( -0.5f, -0.5f + LAYER_HEIGHTS[1], 0.01f ) },
  74     { Vector3( 0.5f, -0.5f, 0.01f ),   Vector3( 0.5f, -0.5f+ LAYER_HEIGHTS[1], 0.01f )   },
  75     // middle layer
  76     { Vector3( -0.5f, -0.5f, 0.02f ),  Vector3( -0.5f, -0.5f, 0.02f )  },
  77     { Vector3( 0.5f, -0.5f, 0.02f ),   Vector3( 0.5f, -0.5f, 0.02f )   },
  78     { Vector3( -0.5f, -0.5f, 0.02f ),  Vector3( -0.5f, -0.5f + LAYER_HEIGHTS[2], 0.02f ) },
  79     { Vector3( 0.5f, -0.5f, 0.02f ),   Vector3( 0.5f, -0.5f+ LAYER_HEIGHTS[2], 0.02f )   },
  80     // mid-top layer
  81     { Vector3( -0.5f, -0.5f, 0.03f ),  Vector3( -0.5f, -0.5f, 0.03f )  },
  82     { Vector3( 0.5f, -0.5f, 0.03f ),   Vector3( 0.5f, -0.5f, 0.03f )   },
  83     { Vector3( -0.5f, -0.5f, 0.03f ),  Vector3( -0.5f, -0.5f + LAYER_HEIGHTS[3], 0.03f ) },
  84     { Vector3( 0.5f, -0.5f, 0.03f ),   Vector3( 0.5f, -0.5f+ LAYER_HEIGHTS[3], 0.03f )   },
  85     // top layer
  86     { Vector3( -0.5f, -0.5f, 0.04f ),  Vector3( -0.5f, -0.5f, 0.04f )  },
  87     { Vector3( 0.5f, -0.5f, 0.04f ),   Vector3( 0.5f, -0.5f, 0.04f )   },
  88     { Vector3( -0.5f, -0.5f, 0.04f ),  Vector3( -0.5f, -0.5f + LAYER_HEIGHTS[4], 0.04f ) },
  89     { Vector3( 0.5f, -0.5f, 0.04f ),   Vector3( 0.5f, -0.5f+ LAYER_HEIGHTS[4], 0.04f )   }
  90   };
  91   Property::Map vertexFormat;
  92   vertexFormat["aPosition1"] = Property::VECTOR3;
  93   vertexFormat["aPosition2"] = Property::VECTOR3;
  94   VertexBuffer vertices = VertexBuffer::New( vertexFormat );
  95   vertices.SetData( vertexData, 20u );
  96
  97   unsigned short indexData[30] = { 0,3,1,0,2,3,4,7,5,4,6,7,8,11,9,8,10,11,12,15,13,12,14,15,16,19,17,16,18,19};
  98
  99   Geometry meshGeometry = Geometry::New();
 100   meshGeometry.AddVertexBuffer( vertices );
 101   meshGeometry.SetIndexBuffer( indexData, sizeof(indexData)/sizeof(indexData[0]) );
 102
 103   // Create the shader
 104   Shader shader = Shader::New( SHADER_BOUNCING_EFFECT_MESH_SHADER_VERT, SHADER_BOUNCING_EFFECT_MESH_SHADER_FRAG );
 105
 106   // Create renderer
 107   Renderer renderer = Renderer::New( meshGeometry, shader );
 108
 109   // Create actor
 110   Actor meshActor= Actor::New();
 111   meshActor.AddRenderer( renderer );
 112
 113   // Register property
 114   bouncePropertyIndex = meshActor.RegisterProperty("uBounceCoefficient", 0.f);
 115
 116   return meshActor;
 117 }
 118
 119 } // namespace Internal
 120
 121 } // namespace Toolkit
 122
 123 } // namespace Dali