SFML/src/SFML/Graphics/View.cpp at master · sharedptr/SFML · GitHub

History

240 lines (190 loc) · 6.32 KB

Raw

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

////////////////////////////////////////////////////////////

// SFML - Simple and Fast Multimedia Library

// This software is provided 'as-is', without any express or implied warranty.

// In no event will the authors be held liable for any damages arising from the use of this software.

// Permission is granted to anyone to use this software for any purpose,

// including commercial applications, and to alter it and redistribute it freely,

// subject to the following restrictions:

// 1. The origin of this software must not be misrepresented;

// you must not claim that you wrote the original software.

// If you use this software in a product, an acknowledgment

// in the product documentation would be appreciated but is not required.

// 2. Altered source versions must be plainly marked as such,

// and must not be misrepresented as being the original software.

// 3. This notice may not be removed or altered from any source distribution.

////////////////////////////////////////////////////////////

// Headers

////////////////////////////////////////////////////////////

#include <SFML/Graphics/View.hpp>

#include <cmath>

namespace sf

{

////////////////////////////////////////////////////////////

View::View() :

m_center (),

m_size (),

m_rotation (0),

m_viewport (0, 0, 1, 1),

m_transformUpdated (false),

m_invTransformUpdated(false)

{

reset(FloatRect(0, 0, 1000, 1000));

}

////////////////////////////////////////////////////////////

View::View(const FloatRect& rectangle) :

m_center (),

m_size (),

m_rotation (0),

m_viewport (0, 0, 1, 1),

m_transformUpdated (false),

m_invTransformUpdated(false)

{

reset(rectangle);

}

////////////////////////////////////////////////////////////

View::View(const Vector2f& center, const Vector2f& size) :

m_center (center),

m_size (size),

m_rotation (0),

m_viewport (0, 0, 1, 1),

m_transformUpdated (false),

m_invTransformUpdated(false)

{

}

////////////////////////////////////////////////////////////

void View::setCenter(float x, float y)

{

m_center.x = x;

m_center.y = y;

m_transformUpdated = false;

m_invTransformUpdated = false;

}

////////////////////////////////////////////////////////////

void View::setCenter(const Vector2f& center)

{

setCenter(center.x, center.y);

}

////////////////////////////////////////////////////////////

void View::setSize(float width, float height)

{

m_size.x = width;

m_size.y = height;

m_transformUpdated = false;

m_invTransformUpdated = false;

}

////////////////////////////////////////////////////////////

void View::setSize(const Vector2f& size)

{

setSize(size.x, size.y);

}

////////////////////////////////////////////////////////////

void View::setRotation(float angle)

{

m_rotation = static_cast<float>(fmod(angle, 360));

if (m_rotation < 0)

m_rotation += 360.f;

m_transformUpdated = false;

m_invTransformUpdated = false;

}

////////////////////////////////////////////////////////////

void View::setViewport(const FloatRect& viewport)

{

m_viewport = viewport;

}

////////////////////////////////////////////////////////////

void View::reset(const FloatRect& rectangle)

{

m_center.x = rectangle.left + rectangle.width / 2.f;

m_center.y = rectangle.top + rectangle.height / 2.f;

m_size.x = rectangle.width;

m_size.y = rectangle.height;

m_rotation = 0;

m_transformUpdated = false;

m_invTransformUpdated = false;

}

////////////////////////////////////////////////////////////

const Vector2f& View::getCenter() const

{

return m_center;

}

////////////////////////////////////////////////////////////

const Vector2f& View::getSize() const

{

return m_size;

}

////////////////////////////////////////////////////////////

float View::getRotation() const

{

return m_rotation;

}

////////////////////////////////////////////////////////////

const FloatRect& View::getViewport() const

{

return m_viewport;

}

////////////////////////////////////////////////////////////

void View::move(float offsetX, float offsetY)

{

setCenter(m_center.x + offsetX, m_center.y + offsetY);

}

////////////////////////////////////////////////////////////

void View::move(const Vector2f& offset)

{

setCenter(m_center + offset);

}

////////////////////////////////////////////////////////////

void View::rotate(float angle)

{

setRotation(m_rotation + angle);

}

////////////////////////////////////////////////////////////

void View::zoom(float factor)

{

setSize(m_size.x * factor, m_size.y * factor);

}

////////////////////////////////////////////////////////////

const Transform& View::getTransform() const

{

// Recompute the matrix if needed

if (!m_transformUpdated)

{

// Rotation components

float angle = m_rotation * 3.141592654f / 180.f;

float cosine = static_cast<float>(std::cos(angle));

float sine = static_cast<float>(std::sin(angle));

float tx = -m_center.x * cosine - m_center.y * sine + m_center.x;

float ty = m_center.x * sine - m_center.y * cosine + m_center.y;

// Projection components

float a = 2.f / m_size.x;

float b = -2.f / m_size.y;

float c = -a * m_center.x;

float d = -b * m_center.y;

// Rebuild the projection matrix

m_transform = Transform( a * cosine, a * sine, a * tx + c,

-b * sine, b * cosine, b * ty + d,

0.f, 0.f, 1.f);

m_transformUpdated = true;

}

return m_transform;

}

////////////////////////////////////////////////////////////

const Transform& View::getInverseTransform() const

{

// Recompute the matrix if needed

if (!m_invTransformUpdated)

{

m_inverseTransform = getTransform().getInverse();

m_invTransformUpdated = true;

}

return m_inverseTransform;

}

} // namespace sf

SFML/src/SFML/Graphics/View.cpp at master · sharedptr/SFML · GitHub

Expand file tree

Breadcrumbs

View.cpp

Latest commit

History

Breadcrumbs

View.cpp

File metadata and controls