From 49a2d3825e61f53012816135ac4c4278c0b27632 Mon Sep 17 00:00:00 2001
From: hgn <hgodden00@gmail.com>
Date: Tue, 20 Jul 2021 13:26:26 +0100
Subject: [PATCH] basic selection code

---
 fishladder.c | 94 ++++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 80 insertions(+), 14 deletions(-)

diff --git a/fishladder.c b/fishladder.c
index e2d5ec1..f6673f7 100644
--- a/fishladder.c
+++ b/fishladder.c
@@ -42,6 +42,9 @@ int main( int argc, char *argv[] )
 #define CELL_FLAG_OUTPUT 0x2
  #define CELL_FLAG_IO (CELL_FLAG_INPUT|CELL_FLAG_OUTPUT)
 #define CELL_FLAG_WALL 0x4
+#define CELL_FLAG_HOVER 0x8
+#define CELL_FLAG_ITER 0x10
+#define CELL_FLAG_CANAL 0x20
 
 static struct
 {
@@ -50,11 +53,31 @@ static struct
 	struct cell
 	{	
 		u32 flags;
+		u32 model_id;
+		
 		char *conditions;
 	}
 	* cells;
 	
+	vec3 origin;
+	struct cell *selected;
+	int select_valid;
+	
 	u32 *io;
+	
+	struct vstack
+	{
+		struct vframe
+		{
+			int x, y;
+			int i;
+		}
+		frames[ 64 ];
+		
+		int level;
+		u32 flags;
+	}
+	stack;
 }
 map;
 
@@ -73,6 +96,13 @@ static void map_free(void)
 	map.io = NULL;
 }
 
+static struct cell *map_tile_at( int pos[2] )
+{
+	if( pos[0] >= 0 && pos[0] < map.x && pos[1] >= 0 && pos[1] < map.y )
+		return map.cells + pos[1]*map.x + pos[0];
+	return NULL;
+}
+
 static int map_load( const char *str )
 {
 	map_free();
@@ -188,6 +218,10 @@ static int map_load( const char *str )
 		c ++;
 	}
 	
+	// Origin top left corner
+	map.origin[0] = -((float)map.x) * 0.5f;
+	map.origin[2] = -((float)map.y) * 0.5f;
+	
 	vg_success( "Map loaded! (%u:%u)\n", map.x, map.y );
 	return 1;
 }
@@ -201,7 +235,7 @@ void vg_update(void)
 
 	glm_mat4_identity( m_view );
 	glm_translate_z( m_view, -10.f );
-	glm_rotate_x( m_view, -1.0f, m_view );
+	glm_rotate_x( m_view, 1.0f, m_view );
 	
 	glm_mat4_mul( m_projection, m_view, m_pv );
 	
@@ -222,12 +256,12 @@ void vg_update(void)
 	vec3 tile_pos;
 	glm_vec3_copy( ray_origin, tile_pos );
 	glm_vec3_muladds( ray_dir, ray_t, tile_pos );
+	glm_vec3_sub( tile_pos, map.origin, tile_pos );
 	
-	tile_pos[0] = floorf( tile_pos[0] + 0.5f );
-	tile_pos[2] = floorf( tile_pos[2] + 0.5f );
+	int tile_x = floorf( tile_pos[0] );
+	int tile_y = floorf( tile_pos[2] );
 	
-	glm_mat4_identity( m_mdl );
-	glm_translate( m_mdl, tile_pos );
+	map.selected = map_tile_at( (int [2]){tile_x, tile_y} );
 }
 
 GLuint tile_vao;
@@ -243,12 +277,43 @@ void vg_render(void)
 	
 	SHADER_USE( colour_shader );
 	glUniformMatrix4fv( SHADER_UNIFORM( colour_shader, "uPv" ), 1, GL_FALSE, (float *)m_pv );
-	glUniform4f( SHADER_UNIFORM( colour_shader, "uColour" ), 0.5f, 0.5f, 0.5f, 1.0f );
-	
-	glUniformMatrix4fv( SHADER_UNIFORM( colour_shader, "uMdl" ), 1, GL_FALSE, (float *)m_mdl );
 	
-	glBindVertexArray( tile_vao );
-	glDrawArrays( GL_TRIANGLES, 0, 6 );
+	for( int y = 0; y < map.y; y ++ )
+	{
+		for( int x = 0; x < map.x; x ++ )
+		{
+			glm_mat4_identity( m_mdl );
+			glm_translate( m_mdl, 
+				(vec3){ 
+					map.origin[0] + (float)x + 0.5f,
+					0.f, 
+					map.origin[2] + (float)y + 0.5f
+				} 
+			);
+			glUniformMatrix4fv( SHADER_UNIFORM( colour_shader, "uMdl" ), 1, GL_FALSE, (float *)m_mdl );
+			
+			struct cell *cell = &map.cells[ y*map.x+x ];
+			
+			if( map.selected != cell )
+			{
+				if( cell->flags & CELL_FLAG_INPUT )
+					glUniform4f( SHADER_UNIFORM( colour_shader, "uColour" ), 0.9f, 0.5f, 0.5f, 1.0f );
+				else if( cell->flags & CELL_FLAG_OUTPUT )
+					glUniform4f( SHADER_UNIFORM( colour_shader, "uColour" ), 0.5f, 0.9f, 0.5f, 1.0f );
+				else if( cell->flags & CELL_FLAG_WALL )
+					glUniform4f( SHADER_UNIFORM( colour_shader, "uColour" ), 0.1f, 0.1f, 0.1f, 1.0f );
+				else
+					glUniform4f( SHADER_UNIFORM( colour_shader, "uColour" ), 0.7f, 0.7f, 0.7f, 1.0f );
+			}
+			else
+			{
+				float flash = sinf( vg_time*2.5f ) * 0.25f + 0.75f;
+				glUniform4f( SHADER_UNIFORM( colour_shader, "uColour" ), flash,flash,flash, 1.0f );
+			}
+			
+			glDrawArrays( GL_TRIANGLES, 0, 6 );
+		}
+	}
 }
 
 void vg_start(void)
@@ -285,12 +350,13 @@ void vg_start(void)
 	
 	map_load
 	( 
-		"###########;\n"
-		"#    +    #;abab\n"
+		"#####-#####;aa\n"
+		"#         #;\n"
+		"#         #;\n"
+		"#         -;bb\n"
 		"#         #;\n"
 		"#         #;\n"
-		"#  -   -  #;aa,bb\n"
-		"###########;\n"
+		"#####+#####;abab\n"
 	);
 }
 
-- 
2.25.1