updated main header
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@@ -2,31 +2,32 @@
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#include <GLFW/glfw3.h>
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Time::Time()
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: lastFrameTime(glfwGetTime())
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, currentFrameTime(lastFrameTime)
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, deltaTime(0)
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, elapsedTime(0.0f) {
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: lastFrameTime(glfwGetTime()), currentFrameTime(lastFrameTime), deltaTime(0), elapsedTime(0.0f)
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{
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}
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void Time::Update() {
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void Time::Update()
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{
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currentFrameTime = glfwGetTime();
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float deltaTimeSeconds = static_cast<float>(currentFrameTime - lastFrameTime);
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// Store delta time in fixed-point and update elapsed time
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deltaTime = SecondsToFixed(deltaTimeSeconds);
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elapsedTime += deltaTimeSeconds;
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lastFrameTime = currentFrameTime;
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}
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int32_t Time::GetDeltaTime() const {
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int32_t Time::GetDeltaTime() const
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{
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return deltaTime;
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}
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float Time::GetElapsedTime() const {
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float Time::GetElapsedTime() const
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{
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return elapsedTime;
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}
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int32_t Time::SecondsToFixed(float seconds) const {
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int32_t Time::SecondsToFixed(float seconds) const
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{
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return static_cast<int32_t>(seconds * FIXED_POINT_SCALE);
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}
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@@ -3,30 +3,26 @@
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#include <cstdint>
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class Time {
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class Time
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{
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public:
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Time();
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// Update time and calculate delta time (call each frame)
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void Update();
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// Get delta time in seconds (fixed-point representation)
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int32_t GetDeltaTime() const;
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// Get total elapsed time in seconds
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float GetElapsedTime() const;
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private:
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// Fixed-point scale for PS1-style precision
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static constexpr int32_t FIXED_POINT_SCALE = 4096; // 12-bit fractional part
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double lastFrameTime; // Last frame timestamp (in seconds, GLFW time)
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double currentFrameTime; // Current frame timestamp
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int32_t deltaTime; // Delta time in fixed-point
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float elapsedTime; // Total elapsed time in seconds
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// Convert float seconds to fixed-point
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static constexpr int32_t FIXED_POINT_SCALE = 4096;
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double lastFrameTime;
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double currentFrameTime;
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int32_t deltaTime;
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float elapsedTime;
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int32_t SecondsToFixed(float seconds) const;
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};
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#endif // TIME_H
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#endif
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