From 95ef47ac4432899867c3c4f425290832eacb3495 Mon Sep 17 00:00:00 2001
From: ExMix <rahuba.youri@mapswithme.com>
Date: Tue, 24 Sep 2013 19:04:24 +0300
Subject: [PATCH] [drape_head] geometry generator. need for debug

---
 drape/utils/list_generator.cpp | 161 +++++++++++++++++++++++++++++++++
 drape/utils/list_generator.hpp |  22 +++++
 2 files changed, 183 insertions(+)
 create mode 100644 drape/utils/list_generator.cpp
 create mode 100644 drape/utils/list_generator.hpp

diff --git a/drape/utils/list_generator.cpp b/drape/utils/list_generator.cpp
new file mode 100644
index 0000000000..146b4fde36
--- /dev/null
+++ b/drape/utils/list_generator.cpp
@@ -0,0 +1,161 @@
+#include "list_generator.hpp"
+
+#include "../../base/math.hpp"
+
+#include "../../std/algorithm.hpp"
+#include "../../std/vector.hpp"
+
+struct Vertex
+{
+  Vertex() {}
+  Vertex(float x , float y)
+    : m_x(x)
+    , m_y(y)
+  {
+  }
+
+  float m_x;
+  float m_y;
+};
+
+struct Color
+{
+  Color() {}
+  Color(float r, float g, float b, float a)
+    : m_r(r)
+    , m_g(g)
+    , m_b(b)
+    , m_a(a)
+  {
+  }
+
+  float m_r;
+  float m_g;
+  float m_b;
+  float m_a;
+};
+
+ListGenerator::ListGenerator()
+  : m_depth(0.0f)
+  , m_x(0.0f)
+  , m_y(0.0f)
+  , m_width(0.0f)
+  , m_height(0.0f)
+{
+}
+
+void ListGenerator::SetDepth(float depth)
+{
+  m_depth = depth;
+}
+
+void ListGenerator::SetViewport(float x, float y, float width, float height)
+{
+  m_x = x;
+  m_y = y;
+  m_width = width;
+  m_height = height;
+}
+
+void ListGenerator::SetProgram(uint32_t program)
+{
+  m_programIndex = program;
+}
+
+void ListGenerator::SetUniforms(const vector<UniformValue> & uniforms)
+{
+  m_uniforms = uniforms;
+}
+
+namespace
+{
+  float clamp01(float value)
+  {
+    return min(max(value, 0.0f), 1.0f);
+  }
+
+  float colorChannel()
+  {
+    return clamp01((rand() % 100) / 99.0f);
+  }
+}
+
+void ListGenerator::Generate(int count, Batcher & batcher)
+{
+  float quadCount = count /2.0;
+  int dimensionCount = ceil(sqrt(quadCount));
+  float dx = m_width / (float)dimensionCount;
+  float dy = m_height / (float)dimensionCount;
+  int vertexCount = count * 3;
+
+  vector<Vertex> vertexes;
+  vertexes.reserve(vertexCount);
+
+  int counter = 0;
+  for (int x = 0; x < dimensionCount; ++x)
+  {
+    for (int y = 0; y < dimensionCount; ++y)
+    {
+      if (counter >= count)
+        break;
+
+      vertexes.push_back(Vertex(m_x + dx * (float)x,      m_y + dy * (float)y));
+      vertexes.push_back(Vertex(m_x + dx * (float)x,      m_y + dy * (float)y + dy));
+      vertexes.push_back(Vertex(m_x + dx * (float)x + dx, m_y + dy * (float)y));
+
+      vertexes.push_back(Vertex(m_x + dx * (float)x + dx, m_y + dy * (float)y));
+      vertexes.push_back(Vertex(m_x + dx * (float)x,      m_y + dy * (float)y + dy));
+      vertexes.push_back(Vertex(m_x + dx * (float)x + dx, m_y + dy * (float)y + dy));
+
+      counter += 2;
+    }
+  }
+
+  vector<Color> colors;
+  colors.reserve(vertexCount);
+  for (int i = 0; i < vertexCount; ++i)
+    colors.push_back(Color( colorChannel()
+                          , colorChannel()
+                          , colorChannel()
+                          , colorChannel()));
+
+  AttributeProvider provider(3, vertexCount);
+  {
+    BindingInfo info(1);
+    BindingDecl & decl = info.GetBindingDecl(0);
+    decl.m_attributeName = "position";
+    decl.m_componentCount = 2;
+    decl.m_componentType = GLConst::GLFloatType;
+    decl.m_offset = 0;
+    decl.m_stride = 0;
+    provider.InitStream(0, info, &vertexes[0]);
+  }
+
+  {
+    BindingInfo info(1);
+    BindingDecl & decl = info.GetBindingDecl(0);
+    decl.m_attributeName = "depth";
+    decl.m_componentCount = 1;
+    decl.m_componentType = GLConst::GLFloatType;
+    decl.m_offset = 0;
+    decl.m_stride = 0;
+    vector<float> depthMemory(vertexCount, m_depth);
+    provider.InitStream(1, info, &depthMemory[0]);
+  }
+
+  {
+    BindingInfo info(1);
+    BindingDecl & decl = info.GetBindingDecl(0);
+    decl.m_attributeName = "color";
+    decl.m_componentCount = 4;
+    decl.m_componentType = GLConst::GLFloatType;
+    decl.m_offset = 0;
+    decl.m_stride = 0;
+    provider.InitStream(2, info, &colors[0]);
+  }
+
+  TextureBinding textureBinding("", false, 0, ReferencePoiner<Texture>(NULL));
+  GLState state(m_programIndex, (int16_t)m_depth, textureBinding);
+  state.GetUniformValues() = m_uniforms;
+  batcher.InsertTriangleList(state, &provider);
+}
diff --git a/drape/utils/list_generator.hpp b/drape/utils/list_generator.hpp
new file mode 100644
index 0000000000..a92c925e8f
--- /dev/null
+++ b/drape/utils/list_generator.hpp
@@ -0,0 +1,22 @@
+#pragma once
+
+#include "../batcher.hpp"
+
+class ListGenerator
+{
+public:
+  ListGenerator();
+
+  void SetDepth(float depth);
+  void SetViewport(float x, float y, float width, float height);
+  void SetProgram(uint32_t program);
+  void SetUniforms(const vector<UniformValue> & uniforms);
+
+  void Generate(int count, Batcher & batcher);
+
+private:
+  float m_depth;
+  float m_x, m_y, m_width, m_height;
+  uint32_t m_programIndex;
+  vector<UniformValue> m_uniforms;
+};