Lenheart
6f8d1f1255
实现核心渲染功能，包括着色器管理、批处理系统、相机控制和纹理加载 - 添加着色器管理器用于加载和管理GLSL着色器程序 - 实现批处理系统优化绘制调用 - 添加相机控制支持视图和投影矩阵 - 实现纹理加载和管理功能 - 添加基础2D渲染API包括绘制四边形和精灵 - 集成到应用系统中，支持自动初始化和清理 - 添加示例着色器用于彩色四边形和纹理精灵 - 更新构建系统包含新的渲染相关文件
46 lines
1.2 KiB
C++
46 lines
1.2 KiB
C++
#include <frostbite2D/graphics/camera.h>
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#include <glm/gtc/matrix_transform.hpp>
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namespace frostbite2D {
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Camera::Camera() : position_(0, 0), zoom_(1.0f) {}
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void Camera::setPosition(const Vec2 &pos) { position_ = pos; }
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void Camera::setZoom(float zoom) { zoom_ = zoom; }
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void Camera::setViewport(int width, int height) {
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viewportWidth_ = width;
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viewportHeight_ = height;
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}
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void Camera::lookAt(const Vec2 &target) { position_ = target; }
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void Camera::move(const Vec2 &delta) { position_ = position_ + delta; }
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void Camera::zoomAt(float factor, const Vec2 &screenPos) {
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Vec2 worldBefore = screenPos - position_;
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zoom_ *= factor;
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Vec2 worldAfter = screenPos - position_;
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position_ = position_ + (worldBefore - worldAfter);
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}
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glm::mat4 Camera::getViewMatrix() const {
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glm::mat4 view = glm::mat4(1.0f);
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view[3][0] = -position_.x;
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view[3][1] = -position_.y;
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view[0][0] = zoom_;
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view[1][1] = zoom_;
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return view;
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}
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glm::mat4 Camera::getProjectionMatrix() const {
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float left = 0.0f;
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float right = static_cast<float>(viewportWidth_);
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float bottom = static_cast<float>(viewportHeight_);
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float top = 0.0f;
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return glm::ortho(left, right, bottom, top, -1.0f, 1.0f);
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}
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} // namespace frostbite2D
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