diff options
Diffstat (limited to 'examples/shader/Shader.cpp')
| -rw-r--r-- | examples/shader/Shader.cpp | 106 |
1 files changed, 93 insertions, 13 deletions
diff --git a/examples/shader/Shader.cpp b/examples/shader/Shader.cpp index ab147d9..8a81fde 100644 --- a/examples/shader/Shader.cpp +++ b/examples/shader/Shader.cpp @@ -31,14 +31,14 @@ public: // Load the shader if (!m_shader.loadFromFile("resources/pixelate.frag", sf::Shader::Fragment)) return false; - m_shader.setParameter("texture", sf::Shader::CurrentTexture); + m_shader.setUniform("texture", sf::Shader::CurrentTexture); return true; } void onUpdate(float, float x, float y) { - m_shader.setParameter("pixel_threshold", (x + y) / 30); + m_shader.setUniform("pixel_threshold", (x + y) / 30); } void onDraw(sf::RenderTarget& target, sf::RenderStates states) const @@ -101,9 +101,9 @@ public: void onUpdate(float time, float x, float y) { - m_shader.setParameter("wave_phase", time); - m_shader.setParameter("wave_amplitude", x * 40, y * 40); - m_shader.setParameter("blur_radius", (x + y) * 0.008f); + m_shader.setUniform("wave_phase", time); + m_shader.setUniform("wave_amplitude", sf::Vector2f(x * 40, y * 40)); + m_shader.setUniform("blur_radius", (x + y) * 0.008f); } void onDraw(sf::RenderTarget& target, sf::RenderStates states) const @@ -155,10 +155,10 @@ public: void onUpdate(float time, float x, float y) { float radius = 200 + std::cos(time) * 150; - m_shader.setParameter("storm_position", x * 800, y * 600); - m_shader.setParameter("storm_inner_radius", radius / 3); - m_shader.setParameter("storm_total_radius", radius); - m_shader.setParameter("blink_alpha", 0.5f + std::cos(time * 3) * 0.25f); + m_shader.setUniform("storm_position", sf::Vector2f(x * 800, y * 600)); + m_shader.setUniform("storm_inner_radius", radius / 3); + m_shader.setUniform("storm_total_radius", radius); + m_shader.setUniform("blink_alpha", 0.5f + std::cos(time * 3) * 0.25f); } void onDraw(sf::RenderTarget& target, sf::RenderStates states) const @@ -215,14 +215,14 @@ public: // Load the shader if (!m_shader.loadFromFile("resources/edge.frag", sf::Shader::Fragment)) return false; - m_shader.setParameter("texture", sf::Shader::CurrentTexture); + m_shader.setUniform("texture", sf::Shader::CurrentTexture); return true; } void onUpdate(float time, float x, float y) { - m_shader.setParameter("edge_threshold", 1 - (x + y) / 2); + m_shader.setUniform("edge_threshold", 1 - (x + y) / 2); // Update the position of the moving entities for (std::size_t i = 0; i < m_entities.size(); ++i) @@ -259,6 +259,85 @@ private: //////////////////////////////////////////////////////////// +// "Geometry" geometry shader example +//////////////////////////////////////////////////////////// +class Geometry : public Effect +{ +public: + + Geometry() : + Effect("geometry shader billboards"), + m_pointCloud(sf::Points, 10000) + { + } + + bool onLoad() + { + // Check if geometry shaders are supported + if (!sf::Shader::isGeometryAvailable()) + return false; + + // Move the points in the point cloud to random positions + for (std::size_t i = 0; i < 10000; i++) + { + // Spread the coordinates from -480 to +480 + // So they'll always fill the viewport at 800x600 + m_pointCloud[i].position.x = rand() % 960 - 480.f; + m_pointCloud[i].position.y = rand() % 960 - 480.f; + } + + // Load the texture + if (!m_logoTexture.loadFromFile("resources/logo.png")) + return false; + + // Load the shader + if (!m_shader.loadFromFile("resources/billboard.vert", "resources/billboard.geom", "resources/billboard.frag")) + return false; + m_shader.setUniform("texture", sf::Shader::CurrentTexture); + + // Set the render resolution (used for proper scaling) + m_shader.setUniform("resolution", sf::Vector2f(800, 600)); + + return true; + } + + void onUpdate(float time, float x, float y) + { + // Reset our transformation matrix + m_transform = sf::Transform::Identity; + // Move to the center of the window + m_transform.translate(400, 300); + // Rotate everything based on cursor position + m_transform.rotate(x * 360.f); + + // Adjust billboard size to scale between 25 and 75 + float size = 25 + std::abs(y) * 50; + + // Update the shader parameter + m_shader.setUniform("size", sf::Vector2f(size, size)); + } + + void onDraw(sf::RenderTarget& target, sf::RenderStates states) const + { + // Prepare the render state + states.shader = &m_shader; + states.texture = &m_logoTexture; + states.transform = m_transform; + + // Draw the point cloud + target.draw(m_pointCloud, states); + } + +private: + + sf::Texture m_logoTexture; + sf::Transform m_transform; + sf::Shader m_shader; + sf::VertexArray m_pointCloud; +}; + + +//////////////////////////////////////////////////////////// /// Entry point of application /// /// \return Application exit code @@ -283,6 +362,7 @@ int main() effects.push_back(new WaveBlur); effects.push_back(new StormBlink); effects.push_back(new Edge); + effects.push_back(new Geometry); std::size_t current = 0; // Initialize them @@ -300,12 +380,12 @@ int main() // Create the description text sf::Text description("Current effect: " + effects[current]->getName(), font, 20); description.setPosition(10, 530); - description.setColor(sf::Color(80, 80, 80)); + description.setFillColor(sf::Color(80, 80, 80)); // Create the instructions text sf::Text instructions("Press left and right arrows to change the current shader", font, 20); instructions.setPosition(280, 555); - instructions.setColor(sf::Color(80, 80, 80)); + instructions.setFillColor(sf::Color(80, 80, 80)); // Start the game loop sf::Clock clock; |