From: hgn <hgodden00@gmail.com>
Date: Sat, 17 Jul 2021 07:39:24 +0000 (+0100)
Subject: height filtering
X-Git-Url: https://harrygodden.com/git/?p=csRadar.git;a=commitdiff_plain;h=0ee9d77f45e007b119de2d44feef81516aaddaaf

height filtering
---

diff --git a/build.sh b/build.sh
index a898a68..299bf3a 100755
--- a/build.sh
+++ b/build.sh
@@ -18,5 +18,5 @@ mkdir -p ext
 echo build: csRadar
 gcc $flags -rdynamic csRadar.c -o csRadar -lm -ldl
 
-echo build: ext/csRadarFree.so
-gcc $flags -fpic -shared -o ext/csRadarFree.so ext_csr_free.c -lm
+echo build: ext/csr_substance.so
+gcc $flags -fpic -shared -o ext/csr_substance.so ext_csr_substance.c -lm
diff --git a/csRadar.c b/csRadar.c
index 9f05c2b..f79fa3b 100644
--- a/csRadar.c
+++ b/csRadar.c
@@ -16,6 +16,8 @@ int main( int argc, char *argv[] )
 	{
 		.padding = 128.f,
 		.resolution = 1024,
+		.min_z = -INFINITY,
+		.max_z =  INFINITY,
 		.write_txt = 1,
 		.api_version = csr_api_version,
 		.sampling_mode = k_EMSAA_RGSS
@@ -91,6 +93,11 @@ int main( int argc, char *argv[] )
 		{
 			extension = arg;
 		}
+		
+		if( (arg = csr_long_opt_arg( "min" )) )
+			api.min_z = atof( arg );
+		if( (arg = csr_long_opt_arg( "max" )) )
+			api.max_z = atof( arg );
 
 		if( csr_opt( 'v' ) || csr_long_opt( "version" ) )
 		{
@@ -121,6 +128,8 @@ int main( int argc, char *argv[] )
 				"   --no-txt                       Don't create matching radar txt\n"
 				"   --multi-sample=RGSS            [ none, 2x, rgss, 8r ]\n"
 				"   --extension=TAR                Use an extension binary instead\n"
+				"   --min=z                        Miniumum height to render\n"
+				"   --max=z                        Maxiumum height to render\n"
 				"\n"
 				"   -v --version                   Display program version\n"
 				"   -h --help                      Display this help text\n"
@@ -169,7 +178,7 @@ int main( int argc, char *argv[] )
 			}
 		
 			if( !extension )
-				extension = "csRadarFree";
+				extension = "csr_substance";
 		
 			csr_so ext = csr_libopen( extension );
 			
diff --git a/csRadar.h b/csRadar.h
index 4192e55..0415518 100644
--- a/csRadar.h
+++ b/csRadar.h
@@ -64,6 +64,9 @@ struct csr_api
 	char vmf_name[ 128 ];			// Just the base name eg. my_map
 	EMSAA sampling_mode;
 	
+	float min_z;
+	float max_z;
+	
 	// Main API interface
 	vmf_map *map;
 	csr_target target;
diff --git a/csrDraw.h b/csrDraw.h
index b744c04..fff1590 100644
--- a/csrDraw.h
+++ b/csrDraw.h
@@ -317,11 +317,12 @@ void simple_raster( csr_target *rt, vmf_vert tri[3] )
 				bcc = (v0[0]*vp[1] - vp[0]*v0[1]) * d;
 				bca = 1.f - bcb - bcc;
 				
-				float hit = (tri[0].co[2] * bca + tri[1].co[2] * bcb + tri[2].co[2] * bcc) +16385.f;
+				float hit = tri[0].co[2] * bca + tri[1].co[2] * bcb + tri[2].co[2] * bcc;
+				float hit_depth = hit + 16385.f;
 				
-				if( hit > depth[i] )
+				if( hit_depth > depth[i] && hit >= rt->bounds[0][2] && hit <= rt->bounds[1][2] )
 				{
-					depth[i] = hit;
+					depth[i] = hit_depth;
 					rt->shader->frag( frag+i*rt->shader->stride, tri, bca, bcb, bcc );
 				}
 			}
diff --git a/ext_csr_free.c b/ext_csr_free.c
deleted file mode 100644
index ffec370..0000000
--- a/ext_csr_free.c
+++ /dev/null
@@ -1,129 +0,0 @@
-// Copyright (C) 2021 Harry Godden (hgn)
-
-// Basic buffers-only version of csRadar
-//=======================================================================================================================
-
-#include "csRadar.h"
-
-float min_height = 0.f;
-v4f remapping_range;
-
-// GBuffer shader
-void frag_gbuffer( void *dest, vmf_vert tri[3], float bca, float bcb, float bcc );
-void frag_gbuffer_clear( void *dest );
-
-csr_shader shader_gbuffer =
-{
-	.stride = sizeof(float)*8, // (origin) x,y, (actual height) z
-	.frag = frag_gbuffer,
-	.clear = frag_gbuffer_clear
-};
-
-// Main drawing function
-void draw_buffers( csr_api *api, int bounds_only );
-
-// Extension implementation
-// =========================================================================================================
-
-// API ENTRY
-void csr_ext_main( csr_api *api )
-{
-	if( !csr_init( api ) )
-		return;
-	
-	csr_create_target( &api->target, api->resolution, api->resolution, api->sampling_mode, &shader_gbuffer );
-	csr_rt_clear( &api->target );
-	
-	// Compute bounds, collect models
-	draw_buffers( api, 1 );
-	csr_auto_fit( &api->target, api->padding );
-	vmf_load_models( api->map );
-	
-	min_height = api->target.bounds[0][2];
-	v2_copy( api->target.bounds[0], remapping_range );
-	v2_sub( api->target.bounds[1], api->target.bounds[0], &remapping_range[2] );
-	
-	// Draw everything
-	draw_buffers( api, 0 ); 
-}
-
-void csr_ext_exit( csr_api *api )
-{
-	csr_rt_free( &api->target );
-}
-
-void draw_buffers( csr_api *api, int bounds_only )
-{
-	csr_filter filter = { .compute_bounds_only = bounds_only };
-	vmf_map *map = api->map;
-
-	if( api->num_strings == 1 )
-	{
-		// Draw everything
-		csr_vmf_render( &api->target, map, map->root, &filter, NULL, NULL );
-		
-		if( !bounds_only )
-		{
-			csr_rt_save_buffers( &api->target, api->output_path, "all" );
-			csr_rt_save_tga( &api->target, "test_test_test.tga", 3*sizeof(float), 4 );
-		}
-	}
-	else
-	{
-		// Draw groups
-		for( int i = 1; i < api->num_strings; i ++ )
-		{
-			csr_filter_update_from_strings( &filter, &api->strings[i] );
-			
-			csr_vmf_render( &api->target, map, map->root, &filter, NULL, NULL );
-
-			if( !bounds_only )
-			{
-				csr_rt_save_buffers( &api->target, api->output_path, api->strings[i].str );			
-				//csr_rt_save_c32f( ... );
-				//csr_rt_save_tga( ... );
-				
-				// tar_write_dds( ... );
-				csr_rt_save_tga( &api->target, "test_test_test.tga", 3*sizeof(float), 4 );
-				
-				csr_rt_clear( &api->target );
-			}
-		}
-	}
-}
-
-void frag_gbuffer( void *dest, vmf_vert tri[3], float bca, float bcb, float bcc )
-{
-	float *dest_colour = (float *)dest;
-
-	// Position
-	v2_sub( tri[0].origin, remapping_range, dest_colour );
-	v2_div( dest_colour, &remapping_range[2], dest_colour );
-
-	dest_colour[2] = tri[0].co[2]*bca + tri[1].co[2]*bcb + tri[2].co[2]*bcc;
-	
-	// Normals
-	v3_muls( tri[0].nrm, bca, dest_colour+3 );
-	v3_muladds( dest_colour+3, tri[1].nrm, bcb, dest_colour+3 );
-	v3_muladds( dest_colour+3, tri[2].nrm, bcc, dest_colour+3 );
-	
-	v3_muls( dest_colour+3, 0.5f, dest_colour+3 );
-	v3_add( (v3f){0.5f,0.5f,0.5f}, dest_colour+3, dest_colour+3 );
-	
-	// Mask
-	dest_colour[6] = 1.f;
-}
-
-void frag_gbuffer_clear( void *dest )
-{
-	float *dest_colour = (float *)dest;
-	dest_colour[0] = 0.f;
-	dest_colour[1] = 0.f;
-	dest_colour[2] = min_height;
-	
-	dest_colour[3] = 0.5f;
-	dest_colour[4] = 0.5f;
-	dest_colour[5] = 1.0f;
-	
-	dest_colour[6] = 0.f;
-}
diff --git a/ext_csr_substance.c b/ext_csr_substance.c
new file mode 100644
index 0000000..4dd2627
--- /dev/null
+++ b/ext_csr_substance.c
@@ -0,0 +1,132 @@
+// Copyright (C) 2021 Harry Godden (hgn)
+
+// Basic buffers-only version of csRadar
+//=======================================================================================================================
+
+#include "csRadar.h"
+
+float min_height = 0.f;
+v4f remapping_range;
+
+// GBuffer shader
+void frag_gbuffer( void *dest, vmf_vert tri[3], float bca, float bcb, float bcc );
+void frag_gbuffer_clear( void *dest );
+
+csr_shader shader_gbuffer =
+{
+	.stride = sizeof(float)*8, // (origin) x,y, (actual height) z
+	.frag = frag_gbuffer,
+	.clear = frag_gbuffer_clear
+};
+
+// Main drawing function
+void draw_buffers( csr_api *api, int bounds_only );
+
+// Extension implementation
+// =========================================================================================================
+
+// API ENTRY
+void csr_ext_main( csr_api *api )
+{
+	if( !csr_init( api ) )
+		return;
+	
+	csr_create_target( &api->target, api->resolution, api->resolution, api->sampling_mode, &shader_gbuffer );
+	csr_rt_clear( &api->target );
+	
+	// Compute bounds, collect models
+	draw_buffers( api, 1 );
+	csr_auto_fit( &api->target, api->padding );
+	vmf_load_models( api->map );
+	
+	min_height = api->target.bounds[0][2];
+	v2_copy( api->target.bounds[0], remapping_range );
+	v2_sub( api->target.bounds[1], api->target.bounds[0], &remapping_range[2] );
+	
+	api->target.bounds[0][2] = api->min_z;
+	api->target.bounds[1][2] = api->max_z;
+	
+	// Draw everything
+	draw_buffers( api, 0 ); 
+}
+
+void csr_ext_exit( csr_api *api )
+{
+	csr_rt_free( &api->target );
+}
+
+void draw_buffers( csr_api *api, int bounds_only )
+{
+	csr_filter filter = { .compute_bounds_only = bounds_only };
+	vmf_map *map = api->map;
+
+	if( api->num_strings == 1 )
+	{
+		// Draw everything
+		csr_vmf_render( &api->target, map, map->root, &filter, NULL, NULL );
+		
+		if( !bounds_only )
+		{
+			csr_rt_save_buffers( &api->target, api->output_path, "all" );
+			csr_rt_save_tga( &api->target, "test_test_test.tga", 3*sizeof(float), 4 );
+		}
+	}
+	else
+	{
+		// Draw groups
+		for( int i = 1; i < api->num_strings; i ++ )
+		{
+			csr_filter_update_from_strings( &filter, &api->strings[i] );
+			
+			csr_vmf_render( &api->target, map, map->root, &filter, NULL, NULL );
+
+			if( !bounds_only )
+			{
+				csr_rt_save_buffers( &api->target, api->output_path, api->strings[i].str );			
+				//csr_rt_save_c32f( ... );
+				//csr_rt_save_tga( ... );
+				
+				// tar_write_dds( ... );
+				csr_rt_save_tga( &api->target, "test_test_test.tga", 3*sizeof(float), 4 );
+				
+				csr_rt_clear( &api->target );
+			}
+		}
+	}
+}
+
+void frag_gbuffer( void *dest, vmf_vert tri[3], float bca, float bcb, float bcc )
+{
+	float *dest_colour = (float *)dest;
+
+	// Position
+	v2_sub( tri[0].origin, remapping_range, dest_colour );
+	v2_div( dest_colour, &remapping_range[2], dest_colour );
+
+	dest_colour[2] = tri[0].co[2]*bca + tri[1].co[2]*bcb + tri[2].co[2]*bcc;
+	
+	// Normals
+	v3_muls( tri[0].nrm, bca, dest_colour+3 );
+	v3_muladds( dest_colour+3, tri[1].nrm, bcb, dest_colour+3 );
+	v3_muladds( dest_colour+3, tri[2].nrm, bcc, dest_colour+3 );
+	
+	v3_muls( dest_colour+3, 0.5f, dest_colour+3 );
+	v3_add( (v3f){0.5f,0.5f,0.5f}, dest_colour+3, dest_colour+3 );
+	
+	// Mask
+	dest_colour[6] = 1.f;
+}
+
+void frag_gbuffer_clear( void *dest )
+{
+	float *dest_colour = (float *)dest;
+	dest_colour[0] = 0.f;
+	dest_colour[1] = 0.f;
+	dest_colour[2] = min_height;
+	
+	dest_colour[3] = 0.5f;
+	dest_colour[4] = 0.5f;
+	dest_colour[5] = 1.0f;
+	
+	dest_colour[6] = 0.f;
+}