Rasterizers are now in sync with engine

The rasterisers (both GLES3 and GLES2) were calculating their own frame delta time
This fix lets the rasterizers get the frame delta through the draw call
That way any regulations to the frame step from the main script will not cause particle systems to process at a different step than the rest of the Engine.

Remove unused rasterizer storage variable

frame.prev_tick variable were not used anywhere and has been removed

4 files changed, 6 insertions, 19 deletions

diff --git a/drivers/gles2/rasterizer_gles2.cpp b/drivers/gles2/rasterizer_gles2.cpp
index ab48e682d6..5bf52733ba 100644
--- a/drivers/gles2/rasterizer_gles2.cpp
+++ b/drivers/gles2/rasterizer_gles2.cpp
@@ -227,21 +227,14 @@ void RasterizerGLES2::initialize() {
 	scene->initialize();
 }
 
-void RasterizerGLES2::begin_frame() {
-	uint64_t tick = OS::get_singleton()->get_ticks_usec();
+void RasterizerGLES2::begin_frame(double frame_step) {
+	time_total += frame_step;
 
-	double delta = double(tick - prev_ticks) / 1000000.0;
-	delta *= Engine::get_singleton()->get_time_scale();
-
-	time_total += delta;
-
-	if (delta == 0) {
+	if (frame_step == 0) {
 		//to avoid hiccups
-		delta = 0.001;
+		frame_step = 0.001;
 	}
 
-	prev_ticks = tick;
-
 	// double time_roll_over = GLOBAL_GET("rendering/limits/time/time_rollover_secs");
 	// if (time_total > time_roll_over)
 	//	time_total = 0; //roll over every day (should be customz
@@ -251,9 +244,7 @@ void RasterizerGLES2::begin_frame() {
 	storage->frame.time[2] = Math::fmod(time_total, 900);
 	storage->frame.time[3] = Math::fmod(time_total, 60);
 	storage->frame.count++;
-	storage->frame.delta = delta;
-
-	storage->frame.prev_tick = tick;
+	storage->frame.delta = frame_step;
 
 	storage->update_dirty_resources();
 
@@ -452,7 +443,6 @@ RasterizerGLES2::RasterizerGLES2() {
 	scene->storage = storage;
 	storage->scene = scene;
 
-	prev_ticks = 0;
 	time_total = 0;
 }
 
diff --git a/drivers/gles2/rasterizer_gles2.h b/drivers/gles2/rasterizer_gles2.h
index 8d57275449..f727af39dd 100644
--- a/drivers/gles2/rasterizer_gles2.h
+++ b/drivers/gles2/rasterizer_gles2.h
@@ -43,7 +43,6 @@ class RasterizerGLES2 : public Rasterizer {
 	RasterizerCanvasGLES2 *canvas;
 	RasterizerSceneGLES2 *scene;
 
-	uint64_t prev_ticks;
 	double time_total;
 
 public:
@@ -54,7 +53,7 @@ public:
 	virtual void set_boot_image(const Ref<Image> &p_image, const Color &p_color, bool p_scale);
 
 	virtual void initialize();
-	virtual void begin_frame();
+	virtual void begin_frame(double frame_step);
 	virtual void set_current_render_target(RID p_render_target);
 	virtual void restore_render_target();
 	virtual void clear_render_target(const Color &p_color);
diff --git a/drivers/gles2/rasterizer_storage_gles2.cpp b/drivers/gles2/rasterizer_storage_gles2.cpp
index de7359a18b..fa2a1b9190 100644
--- a/drivers/gles2/rasterizer_storage_gles2.cpp
+++ b/drivers/gles2/rasterizer_storage_gles2.cpp
@@ -1988,7 +1988,6 @@ void RasterizerStorageGLES2::initialize() {
 	}
 
 	frame.count = 0;
-	frame.prev_tick = 0;
 	frame.delta = 0;
 	frame.current_rt = NULL;
 	frame.clear_request = false;
diff --git a/drivers/gles2/rasterizer_storage_gles2.h b/drivers/gles2/rasterizer_storage_gles2.h
index b735f2e148..7bf7990b85 100644
--- a/drivers/gles2/rasterizer_storage_gles2.h
+++ b/drivers/gles2/rasterizer_storage_gles2.h
@@ -814,7 +814,6 @@ public:
 		int canvas_draw_commands;
 		float time[4];
 		float delta;
-		uint64_t prev_tick;
 		uint64_t count;
 
 	} frame;