claude_code/procedural-3d-engine
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Frame rate independent animation updates

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This commit is contained in:
saschawillems 2016-03-11 18:54:37 +01:00
parent 73c11f6dba
commit 4c217cef21
1 changed files with 11 additions and 1 deletions
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12
android/triangle/triangle.NativeActivity/triangle.cpp
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@ -15,6 +15,7 @@
#include "vulkanandroid.h" #include "vulkanandroid.h"
#include "vulkanswapchain.hpp" #include "vulkanswapchain.hpp"
#include <android/asset_manager.h> #include <android/asset_manager.h>
#include <chrono>
#define GLM_FORCE_RADIANS #define GLM_FORCE_RADIANS
#define GLM_FORCE_DEPTH_ZERO_TO_ONE #define GLM_FORCE_DEPTH_ZERO_TO_ONE
@ -39,6 +40,7 @@ struct VulkanExample
uint32_t width; uint32_t width;
uint32_t height; uint32_t height;
struct saved_state state; struct saved_state state;
float frameTimer;
// Vulkan // Vulkan
VkInstance instance; VkInstance instance;
@ -1159,10 +1161,12 @@ void android_main(struct android_app* state)
// Render frame // Render frame
if (engine->prepared) if (engine->prepared)
{ {
auto tStart = std::chrono::high_resolution_clock::now();
if (engine->animating) if (engine->animating)
{ {
// Update rotation // Update rotation
engine->state.rotation.y += 1.0f; engine->state.rotation.y += engine->frameTimer * 0.1f;
if (engine->state.rotation.y > 360.0f) if (engine->state.rotation.y > 360.0f)
{ {
engine->state.rotation.y -= 360.0f; engine->state.rotation.y -= 360.0f;
@ -1171,6 +1175,12 @@ void android_main(struct android_app* state)
engine->updateUniformBuffers(); engine->updateUniformBuffers();
} }
engine->draw(); engine->draw();
auto tEnd = std::chrono::high_resolution_clock::now();
auto tDiff = std::chrono::duration<double, std::milli>(tEnd - tStart).count();
engine->frameTimer = (float)tDiff;
} }
} }
} }