From 371e8623161095b8f74d51d37f3de368b5cd584c Mon Sep 17 00:00:00 2001
From: Magnus Auvinen <magnus.auvinen@gmail.com>
Date: Sun, 11 Jan 2009 10:26:17 +0000
Subject: fixed so the laser bounces correctly at low angles

---
 src/game/collision.cpp                  | 20 +++++++++++++-------
 src/game/collision.hpp                  |  2 +-
 src/game/gamecore.cpp                   |  2 +-
 src/game/server/entities/laser.cpp      |  6 ++++--
 src/game/server/entities/projectile.cpp |  2 +-
 src/game/server/gamemodes/ctf.cpp       |  2 +-
 6 files changed, 21 insertions(+), 13 deletions(-)

(limited to 'src/game')

diff --git a/src/game/collision.cpp b/src/game/collision.cpp
index 2747b22f..73f4a9c5 100644
--- a/src/game/collision.cpp
+++ b/src/game/collision.cpp
@@ -60,22 +60,28 @@ int col_is_solid(int x, int y)
 
 
 // TODO: rewrite this smarter!
-int col_intersect_line(vec2 pos0, vec2 pos1, vec2 *out)
+int col_intersect_line(vec2 pos0, vec2 pos1, vec2 *out_collision, vec2 *out_before_collision)
 {
 	float d = distance(pos0, pos1);
+	vec2 last = pos0;
 	
 	for(float f = 0; f < d; f++)
 	{
 		float a = f/d;
 		vec2 pos = mix(pos0, pos1, a);
-		if(col_is_solid((int)pos.x, (int)pos.y))
+		if(col_is_solid(round(pos.x), round(pos.y)))
 		{
-			if(out)
-				*out = pos;
-			return col_get((int)pos.x, (int)pos.y);
+			if(out_collision)
+				*out_collision = pos;
+			if(out_before_collision)
+				*out_before_collision = last;
+			return col_get(round(pos.x), round(pos.y));
 		}
+		last = pos;
 	}
-	if(out)
-		*out = pos1;
+	if(out_collision)
+		*out_collision = pos1;
+	if(out_before_collision)
+		*out_before_collision = pos1;
 	return 0;
 }
diff --git a/src/game/collision.hpp b/src/game/collision.hpp
index 676a477a..0f072daa 100644
--- a/src/game/collision.hpp
+++ b/src/game/collision.hpp
@@ -16,6 +16,6 @@ int col_is_solid(int x, int y);
 int col_get(int x, int y);
 int col_width();
 int col_height();
-int col_intersect_line(vec2 pos0, vec2 pos1, vec2 *out);
+int col_intersect_line(vec2 pos0, vec2 pos1, vec2 *out_collision, vec2 *out_before_collision);
 
 #endif
diff --git a/src/game/gamecore.cpp b/src/game/gamecore.cpp
index 8d167398..7818fa4b 100644
--- a/src/game/gamecore.cpp
+++ b/src/game/gamecore.cpp
@@ -302,7 +302,7 @@ void CHARACTER_CORE::tick(bool use_input)
 		// make sure that the hook doesn't go though the ground
 		bool going_to_hit_ground = false;
 		bool going_to_retract = false;
-		int hit = col_intersect_line(hook_pos, new_pos, &new_pos);
+		int hit = col_intersect_line(hook_pos, new_pos, &new_pos, 0);
 		if(hit)
 		{
 			if(hit&COLFLAG_NOHOOK)
diff --git a/src/game/server/entities/laser.cpp b/src/game/server/entities/laser.cpp
index 20054ed4..2c6fa0ff 100644
--- a/src/game/server/entities/laser.cpp
+++ b/src/game/server/entities/laser.cpp
@@ -48,14 +48,16 @@ void LASER::do_bounce()
 	}
 	
 	vec2 to = pos + dir*energy;
+	vec2 org_to = to;
 	
-	if(col_intersect_line(pos, to, &to))
+	if(col_intersect_line(pos, to, 0x0, &to))
 	{
 		if(!hit_character(pos, to))
 		{
 			// intersected
 			from = pos;
-			pos = to - dir*2;
+			pos = to;
+
 			vec2 temp_pos = pos;
 			vec2 temp_dir = dir*4.0f;
 			
diff --git a/src/game/server/entities/projectile.cpp b/src/game/server/entities/projectile.cpp
index e0b4701a..2a8de766 100644
--- a/src/game/server/entities/projectile.cpp
+++ b/src/game/server/entities/projectile.cpp
@@ -65,7 +65,7 @@ void PROJECTILE::tick()
 
 	lifespan--;
 	
-	int collide = col_intersect_line(prevpos, curpos, &curpos);
+	int collide = col_intersect_line(prevpos, curpos, &curpos, 0);
 	//int collide = col_check_point((int)curpos.x, (int)curpos.y);
 	CHARACTER *ownerchar = game.get_player_char(owner);
 	CHARACTER *targetchr = game.world.intersect_character(prevpos, curpos, 6.0f, curpos, ownerchar);
diff --git a/src/game/server/gamemodes/ctf.cpp b/src/game/server/gamemodes/ctf.cpp
index 6e87841f..65058883 100644
--- a/src/game/server/gamemodes/ctf.cpp
+++ b/src/game/server/gamemodes/ctf.cpp
@@ -122,7 +122,7 @@ void GAMECONTROLLER_CTF::tick()
 			int num = game.world.find_entities(f->pos, 32.0f, (ENTITY**)close_characters, MAX_CLIENTS, NETOBJTYPE_CHARACTER);
 			for(int i = 0; i < num; i++)
 			{
-				if(!close_characters[i]->alive || close_characters[i]->player->team == -1 || col_intersect_line(f->pos, close_characters[i]->pos, NULL))
+				if(!close_characters[i]->alive || close_characters[i]->player->team == -1 || col_intersect_line(f->pos, close_characters[i]->pos, NULL, NULL))
 					continue;
 				
 				if(close_characters[i]->team == f->team)
-- 
cgit 1.4.1