From ecbd6ce6ca6f616169fb319ec86d963db4f84287 Mon Sep 17 00:00:00 2001
From: John Tsiombikas <nuclear@member.fsf.org>
Date: Thu, 19 Aug 2021 05:55:00 +0300
Subject: [PATCH] cell select

---
 tools/dunger/src/level.c |   75 +++++++++++++++++++++++++++++++++++-----------
 tools/dunger/src/main.c  |    8 +++--
 2 files changed, 62 insertions(+), 21 deletions(-)

diff --git a/tools/dunger/src/level.c b/tools/dunger/src/level.c
index 6fb5706..1e88b5c 100644
--- a/tools/dunger/src/level.c
+++ b/tools/dunger/src/level.c
@@ -7,6 +7,11 @@
 extern int view_width, view_height;
 extern float view_panx, view_pany, view_zoom;
 
+extern int mousex, mousey, splitx;
+
+static int cellsz;
+static struct cell *selcell;
+
 
 struct level *create_level(int xsz, int ysz)
 {
@@ -31,46 +36,80 @@ void free_level(struct level *lvl)
 	free(lvl);
 }
 
+void cell_to_pos(struct level *lvl, int cx, int cy, float *px, float *py)
+{
+	if(px) *px = (cx - lvl->width / 2.0f) * cellsz - view_panx + view_width / 2.0f;
+	if(py) *py = (cy - lvl->height / 2.0f) * cellsz - view_pany + view_height / 2.0f;
+}
+
+struct cell *pos_to_cell(struct level *lvl, float px, float py, int *cx, int *cy)
+{
+	int col, row;
+
+	col = (px + view_panx - view_width / 2.0f) / cellsz + lvl->width / 2.0f;
+	row = (py + view_pany - view_height / 2.0f) / cellsz + lvl->height / 2.0f;
+
+	if(cx) *cx = col;
+	if(cy) *cy = row;
+
+	if(col >= 0 && col < lvl->width && row >= 0 && row < lvl->height) {
+		return lvl->cells + row * lvl->width + col;
+	}
+	return 0;
+}
+
 #define LTHICK	0.5f
 static void draw_cell(struct level *lvl, struct cell *cell)
 {
 	int cidx, row, col;
-	float x, y, xsz, ysz, sz;
+	float x, y, hsz;
 	static const float colors[][3] = {{0, 0, 0}, {0.6, 0.6, 0.6}, {0.4, 0.2, 0.1}};
 
-	xsz = view_zoom * view_width / lvl->width;
-	ysz = view_zoom * view_height / lvl->height;
-	sz = xsz > ysz ? ysz : xsz;
+	hsz = cellsz * 0.5f;
 
 	cidx = cell - lvl->cells;
 	row = cidx / lvl->width;
 	col = cidx % lvl->width;
 
-	x = col * sz - view_panx;
-	y = row * sz - view_pany;
+	cell_to_pos(lvl, col, row, &x, &y);
+	/*printf("c->p: %d,%d -> %f,%f\n", col, row, x, y);
+	pos_to_cell(lvl, x, y, &col, &row);
+	printf("p->c: %f,%f -> %d,%d\n", x, y, col, row);*/
 
-	glColor3f(1, 1, 1);
-	glVertex2f(x, y);
-	glVertex2f(x + sz, y);
-	glVertex2f(x + sz, y + sz);
-	glVertex2f(x, y + sz);
+	if(selcell == cell) {
+		glColor3f(0.4, 1.0f, 0.4);
+	} else {
+		glColor3f(0.5f, 0.5f, 0.5f);
+	}
+	glVertex2f(x - hsz, y - hsz);
+	glVertex2f(x + hsz, y - hsz);
+	glVertex2f(x + hsz, y + hsz);
+	glVertex2f(x - hsz, y + hsz);
 
-	x += LTHICK;
-	y += LTHICK;
-	sz -= LTHICK * 2.0f;
+	x += LTHICK / 2.0f;
+	y += LTHICK / 2.0f;
+	hsz -= LTHICK * 2.0f;
 
 	glColor3fv(colors[cell->type]);
-	glVertex2f(x, y);
-	glVertex2f(x + sz, y);
-	glVertex2f(x + sz, y + sz);
-	glVertex2f(x, y + sz);
+	glVertex2f(x - hsz, y - hsz);
+	glVertex2f(x + hsz, y - hsz);
+	glVertex2f(x + hsz, y + hsz);
+	glVertex2f(x - hsz, y + hsz);
 }
 
 void draw_level(struct level *lvl)
 {
 	int i, j;
+	float xsz, ysz, hsz;
 	struct cell *cell;
 
+	xsz = view_zoom * view_width / lvl->width;
+	ysz = view_zoom * view_height / lvl->height;
+	cellsz = xsz > ysz ? ysz : xsz;
+	hsz = cellsz / 2.0f;
+
+	selcell = pos_to_cell(lvl, mousex + hsz - splitx, view_height - mousey + hsz, 0, 0);
+
 	glBegin(GL_QUADS);
 	cell = lvl->cells;
 	for(i=0; i<lvl->height; i++) {
diff --git a/tools/dunger/src/main.c b/tools/dunger/src/main.c
index 52074ba..bfc0d43 100644
--- a/tools/dunger/src/main.c
+++ b/tools/dunger/src/main.c
@@ -28,11 +28,11 @@ int view_width, view_height;
 float view_panx, view_pany, view_zoom = 1.0f;
 
 static int bnstate[8];
-static int mousex, mousey, clickx, clicky;
+int mousex, mousey, clickx, clicky;
 
 static float uiscale = 1.0f;
 #define UISPLIT	150
-static int splitx;
+int splitx;
 
 #define FONTSZ	16
 static struct dtx_font *uifont;
@@ -45,7 +45,7 @@ int main(int argc, char **argv)
 {
 	glutInit(&argc, argv);
 	glutInitWindowSize(1280, 800);
-	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
+	glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_MULTISAMPLE);
 	glutCreateWindow("dunger");
 
 	win_width = glutGet(GLUT_WINDOW_WIDTH);
@@ -73,6 +73,8 @@ static int init(void)
 {
 	utk_widget *win;
 
+	glEnable(GL_MULTISAMPLE);
+
 	glClearColor(0.15, 0.15, 0.15, 1);
 
 	if(!(uifont = dtx_open_font("uifont.ttf", 0))) {
-- 
1.7.10.4