From 4bf61f911194bb0b40d302df8d7dfff2fda19892 Mon Sep 17 00:00:00 2001
From: Paweł Redman <pawel.redman@gmail.com>
Date: Wed, 30 Mar 2016 08:25:04 +0200
Subject: Initial commit.

---
 src/ui.c | 461 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 461 insertions(+)
 create mode 100644 src/ui.c

(limited to 'src/ui.c')

diff --git a/src/ui.c b/src/ui.c
new file mode 100644
index 0000000..0f4477b
--- /dev/null
+++ b/src/ui.c
@@ -0,0 +1,461 @@
+#include "common.h"
+
+struct {
+	float font_size;
+	float color_text[4];    
+	float color_text_light[4];
+	float color_background[4]; 
+	float color_main[4];
+	float color_info[4];
+	float color_selection[4];
+} theme =
+{
+	.font_size = 20,
+	.color_text = {0, 0, 0, 1},   
+	.color_text_light = {0.5, 0.5, 0.5, 1},
+	.color_background = {0.1, 0.1, 0.1, 1},  
+	.color_main = {0.75, 0.75, 0.75, 1},
+	.color_info = {1, 1, 1, 1},
+	.color_selection = {1, 0, 0, 1}
+};
+
+#define MAX_INFO 1024
+
+typedef struct {
+	bool dragging;
+	r_xsection_type xsection_type;
+	float xsection_frac;
+	bool selected;
+	vec3_t selection;
+
+	bool info_valid;
+	int64_t info_time;
+	char info[MAX_INFO];
+
+	float margin_bottom, margin_top;
+
+	mst2_t origin, scale; // in virtual space
+	mst2_t tf_v2s, tf_x2s;
+	r_xsection xsection;
+} ui_simview;
+
+typedef enum {
+	UI_WINDOW_SIMVIEW
+} ui_window_type;
+
+typedef struct ui_window_s ui_window;
+struct ui_window_s {
+	int w, h;
+	r_window *rw;
+	ui_window *prev, *next;
+
+	bool initialized;
+	int64_t last_frame;
+	size_t frame_count;
+	vec2_t mouse;
+
+	ui_window_type type;
+	ui_simview simview;
+};
+
+static struct {
+	ui_window *windows;
+
+	bool use_window_open_timer;
+	int64_t window_open_timer;
+} uis;
+
+
+int ui_init(void)
+{
+	return 0;
+}
+
+static void ui_window_destroy(ui_window *uiw)
+{
+	con_printf("ui_window_destroy: destroying uiw=%p\n", uiw);
+	
+	if (uiw->prev)
+		uiw->prev->next = uiw->next;
+	if (uiw->next)
+		uiw->next->prev = uiw->prev;
+
+	if (uis.windows == uiw)
+		uis.windows = uiw->next;
+
+	r_xsection_destroy(&uiw->simview.xsection);
+
+	free(uiw);
+}
+
+void ui_quit(void)
+{
+	while (uis.windows)
+		ui_window_destroy(uis.windows);
+}
+
+void ui_renderer_window_register(r_window *rw)
+{
+	ui_window *uiw;
+
+	uiw = calloc(1, sizeof(ui_window));
+	if (!uiw)
+		abort();
+
+	uiw->prev = NULL;
+	if (uis.windows)
+		uis.windows->prev = uiw;
+	uiw->next = uis.windows;
+	uis.windows = uiw;
+
+	uiw->rw = rw;
+
+	con_printf("ui_renderer_window_register: registered window #%i"
+	           ", uiw = %p\n", SDL_GetWindowID(rw->window), uiw);
+
+	r_xsection_create(&uiw->simview.xsection);
+}
+
+static ui_window *ui_find_window(int id)
+{
+	ui_window *uiw;
+
+	for (uiw = uis.windows; uiw; uiw = uiw->next)
+		if (SDL_GetWindowID(uiw->rw->window) == id)
+			return uiw;
+
+	return NULL;
+}
+
+void ui_infof(ui_window *uiw, const char *fmt, ...)
+{
+	va_list vl;
+
+	va_start(vl, fmt);
+	vsnprintf(uiw->simview.info, MAX_INFO, fmt, vl);
+	va_end(vl);
+
+	uiw->simview.info_valid = true;
+	uiw->simview.info_time = get_time();
+}
+
+static void ui_simview_set_selection(ui_simview *sv, vec2_t sel_2d)
+{
+	if (sel_2d[0] < 0.0f || sel_2d[0] > 1.0f ||
+	    sel_2d[1] < 0.0f || sel_2d[1] > 1.0f) {
+		sv->selected = false;
+		return;
+	}
+
+	switch (sv->xsection_type) {
+	case XSECTION_XY:
+		v3_set(sv->selection, sel_2d[0], sel_2d[1], sv->xsection_frac);
+		break;
+
+	case XSECTION_XZ:
+		v3_set(sv->selection, sel_2d[0], sv->xsection_frac, sel_2d[1]);
+		break;
+
+	case XSECTION_YZ:
+		v3_set(sv->selection, sv->xsection_frac, sel_2d[0], sel_2d[1]);
+		break;
+	}
+
+	sv->selected = true;
+}
+
+void ui_event_window(SDL_Event *event, ui_window *uiw)
+{
+	ui_simview *sv = &uiw->simview;
+
+	if (!uiw->initialized)
+		return;
+
+	switch (event->type) {
+	case SDL_MOUSEWHEEL:
+		{
+			vec2_t mouse_v;
+			float delta;
+
+			v2_div_mst2(mouse_v, uiw->mouse, sv->tf_v2s);
+
+			delta = pow(1.1, event->wheel.y);
+
+			v2_mul(sv->scale, sv->scale, delta);
+
+			v2_sub(sv->origin, sv->origin, mouse_v);
+			v2_mul(sv->origin, sv->origin, delta);
+			v2_add(sv->origin, sv->origin, mouse_v);
+		}
+		break;
+
+	case SDL_MOUSEBUTTONDOWN:
+		if (event->button.button == SDL_BUTTON_LEFT &&
+		    event->button.y > sv->margin_top &&
+		    event->button.y < uiw->h - sv->margin_bottom)
+			sv->dragging = true;
+
+		if (event->button.button == SDL_BUTTON_RIGHT) {
+			vec2_t sel_2d;
+
+			v2_div_mst2(sel_2d, uiw->mouse, sv->tf_x2s);
+			ui_simview_set_selection(sv, sel_2d);
+		}
+		break;
+
+	case SDL_MOUSEBUTTONUP:
+		if (event->button.button == SDL_BUTTON_LEFT)
+			sv->dragging = false;
+		break;
+
+	case SDL_MOUSEMOTION:
+		uiw->mouse[0] = event->motion.x;
+		uiw->mouse[1] = event->motion.y;
+
+		if (sv->dragging) {
+			vec2_t delta_v;
+
+			v2_set(delta_v, event->motion.xrel, event->motion.yrel);
+			v2_div_mst2_nt(delta_v, delta_v, sv->tf_v2s);
+			v2_add(sv->origin, sv->origin, delta_v);
+		}
+		break;
+
+	case SDL_KEYDOWN:
+		switch (event->key.keysym.sym) {
+		case SDLK_1:
+			sv->xsection_type = XSECTION_XY;
+			break;
+
+		case SDLK_2:
+			sv->xsection_type = XSECTION_XZ;
+			break;
+
+		case SDLK_3:
+			sv->xsection_type = XSECTION_YZ;
+			break;
+
+		case SDLK_w:
+			sv->xsection_frac += 0.1f;
+			if (sv->xsection_frac > 1.0f)
+				sv->xsection_frac = 1.0f;
+			break;
+
+		case SDLK_s:
+			sv->xsection_frac -= 0.1f;
+			if (sv->xsection_frac < 0.0f)
+				sv->xsection_frac = 0.0f;
+			break;
+		}
+	}
+}
+
+void ui_event(SDL_Event *event)
+{
+	if (event->type == SDL_KEYDOWN &&
+	    event->key.keysym.sym == SDLK_RETURN) {
+
+		if (!uis.use_window_open_timer ||
+		    uis.window_open_timer + 500000000 <= get_time()) {
+			r_window *rw;
+
+			uis.use_window_open_timer = true;
+			uis.window_open_timer = get_time();
+
+			rw = r_window_create();
+			if (rw)
+				ui_renderer_window_register(rw);
+		}
+	} else if (event->type == SDL_WINDOWEVENT &&
+	           event->window.event == SDL_WINDOWEVENT_CLOSE) {
+			ui_window *uiw;
+
+			uiw = ui_find_window(event->window.windowID);
+			if (!uiw)
+				con_printf("WARNING: ui_event: SDL_WINDOWEVENT_"
+				           "CLOSE for a window not registered"
+				           " by ui\n");
+			else {
+				r_window_destroy(uiw->rw);
+				ui_window_destroy(uiw);
+			}
+	} else {
+		ui_window *uiw;
+
+		// SDL sends some SDL_WINDOWEVENTs after a window's been closed
+
+		uiw = ui_find_window(event->window.windowID);
+		if (uiw)
+			ui_event_window(event, uiw);
+	}
+}
+
+void ui_animate_exp(float *val, float targ, float lambda, float dt)
+{
+	*val = targ + (*val - targ) * exp(-lambda * dt);
+}
+
+void ui_draw_window_simview(ui_window *uiw, phy_sim *sim, int64_t time,
+                            float dt)
+{
+	ui_simview *sv = &uiw->simview;
+	float aspect_ratio;
+	vec2_t origin_s, scale_s;
+	phy_field_em *field_em = sim->fields + 2;
+
+	const char *xsection_type_strings[] = {
+		"Przekrój XY przez Z",
+		"Przekrój XZ przez Y",
+		"Przekrój YZ przez X"
+	};
+
+	// xsection
+
+	SDL_mutexP(sim->rotate_lock);
+	r_xsection_update(uiw->rw, &sv->xsection, &sim->field_info,
+	                  field_em->E, sv->xsection_type, sv->xsection_frac);
+	SDL_mutexV(sim->rotate_lock);
+
+	aspect_ratio = sv->xsection.aspect_ratio;
+
+	if (uiw->w > uiw->h * aspect_ratio)
+		mst2_set(sv->tf_v2s, (uiw->w - uiw->h * aspect_ratio) / 2.0f, 0,
+		         uiw->h * aspect_ratio, uiw->h);
+	else
+		mst2_set(sv->tf_v2s, 0, (uiw->h - uiw->w / aspect_ratio) / 2.0f,
+		         uiw->w, uiw->w / aspect_ratio);
+
+	v2_mul_mst2(origin_s, sv->origin, sv->tf_v2s);
+	v2_mul_mst2_nt(scale_s, sv->scale, sv->tf_v2s);
+
+	mst2_set(sv->tf_x2s, origin_s[0], origin_s[1],
+	         scale_s[0], scale_s[1]);
+
+	r_xsection_draw(uiw->rw, &sv->xsection, origin_s[0], origin_s[1],
+	                scale_s[0], scale_s[1]);
+
+	// xsection - selection
+
+	if (sv->selected)
+	{
+		vec2_t selection_s;
+
+		switch (sv->xsection_type) {
+		case XSECTION_XY:
+			v2_set(selection_s, sv->selection[0], sv->selection[1]);
+			break;
+
+		case XSECTION_XZ:
+			v2_set(selection_s, sv->selection[0], sv->selection[2]);
+			break;
+
+		case XSECTION_YZ:
+			v2_set(selection_s, sv->selection[1], sv->selection[2]);
+			break;
+		}
+
+		v2_mul_mst2(selection_s, selection_s, sv->tf_x2s);    
+
+		r_draw_line(uiw->rw, selection_s[0], 0, selection_s[0], uiw->h,
+		            theme.color_selection);
+		r_draw_line(uiw->rw, 0, selection_s[1], uiw->w, selection_s[1],
+		            theme.color_selection);
+
+
+		r_draw_rect(uiw->rw, 0, uiw->h - theme.font_size,
+		            uiw->w, theme.font_size, theme.color_main);
+
+		r_draw_text(uiw->rw, 0, uiw->h - theme.font_size,
+		            theme.font_size,
+		            va("x = [%f %f %f]", sv->selection[0],
+		            sv->selection[1], sv->selection[2]),
+		            theme.color_text, 0); 
+
+		sv->margin_bottom = 1 * theme.font_size;
+	}
+	else
+		sv->margin_bottom = 0;
+
+	// status
+
+	r_draw_rect(uiw->rw, 0, 0, uiw->w, theme.font_size, theme.color_main);
+
+	r_draw_text(uiw->rw, uiw->w, 0, theme.font_size,
+	            va("%.0fkl./s %04zu", 1.0f / dt, uiw->frame_count % 10000),
+	            theme.color_text_light, TEXT_RIGHTX);
+
+	r_draw_text(uiw->rw, 0, 0, theme.font_size,
+	            va("%s = %f", xsection_type_strings[sv->xsection_type],
+	            sv->xsection_frac),
+	            theme.color_text, 0);
+
+	// info text
+
+	if (sv->info_valid && sv->info_time + 2000000000ll > time)
+	{
+		vec4_t color;
+
+		if (sv->info_time + 1000000000ll >= time)
+			color[3] = 1.0f;
+		else
+			color[3] = 1.0f - (time - sv->info_time - 1000000000ll)
+			           / 1.0e9f;
+
+		v3_copy(color, theme.color_info);
+
+		r_draw_rect(uiw->rw, 0, theme.font_size, uiw->w,
+		            theme.font_size, color);
+
+		v3_copy(color, theme.color_text);
+
+		r_draw_text(uiw->rw, uiw->w / 2.0f, theme.font_size,
+		            theme.font_size, sv->info, color, TEXT_CENTERX);
+	}
+}
+
+void ui_draw_window(ui_window *uiw, phy_sim *sim)
+{
+	ui_simview *sv = &uiw->simview;
+	int64_t time;
+	float dt;
+
+	time = get_time();
+
+	if (!uiw->initialized) {
+		uiw->initialized = true;
+		uiw->last_frame = time;
+
+		v2_set(sv->origin, 0, 0);
+		v2_set(sv->scale, 1, 1);
+		sv->xsection_type = XSECTION_XY;
+		sv->xsection_frac = 0.5f;
+
+		sv->selected = false;
+		sv->margin_top = theme.font_size;
+		sv->margin_bottom = 0;
+
+		sv->info_valid = false;
+
+		r_clear(uiw->rw, r_color_black);
+		return;
+	}
+
+	dt = (get_time() - uiw->last_frame) * 1.0e-9;
+
+	r_clear(uiw->rw, r_color_black);
+	ui_draw_window_simview(uiw, sim, time, dt);
+	r_flip(uiw->rw);
+
+	uiw->last_frame = time;
+}
+
+void ui_draw(phy_sim *sim)
+{
+	ui_window *uiw;
+
+	for (uiw = uis.windows; uiw; uiw = uiw->next) {
+		SDL_GetWindowSize(uiw->rw->window, &uiw->w, &uiw->h);
+		ui_draw_window(uiw, sim);
+		uiw->frame_count++;
+	}
+}
-- 
cgit