From 9836d52cebef33002b8cea7d2e15d4e0da043e76 Mon Sep 17 00:00:00 2001
From: taw27 <taw27@84d2e878-0bd5-11dd-ad15-13eda11d74c5>
Date: Sun, 10 Aug 2008 19:14:40 +0000
Subject: Process texture and Ks components from OBJ files

git-svn-id: svn://cook.msm.cam.ac.uk:745/thrust3d/thrust3d@246 84d2e878-0bd5-11dd-ad15-13eda11d74c5
---
 src/model.c     | 10 ++++++++--
 src/obj2model.c | 22 ++++++++++++++++++++++
 src/render.c    | 15 +++++++++++++--
 src/types.h     |  2 ++
 4 files changed, 45 insertions(+), 4 deletions(-)

diff --git a/src/model.c b/src/model.c
index 570a128..81958ec 100644
--- a/src/model.c
+++ b/src/model.c
@@ -78,7 +78,7 @@ static Model *model_new(const char *name) {
 static Primitive *model_add_primitive(Model *model, GLenum type, GLfloat *vertices, GLfloat *normals,
 					GLfloat *texcoords, int n, PrimitiveAttrib attribs, GLfloat r, GLfloat g,
 					GLfloat b, char *texture, GLfloat radius, GLfloat shininess,
-					int vbos, int coll) {
+					int vbos, int coll, GLfloat colspec) {
 	
 	Primitive *p;
 	
@@ -116,6 +116,7 @@ static Primitive *model_add_primitive(Model *model, GLenum type, GLfloat *vertic
 	p->col_r = r;
 	p->col_g = g;
 	p->col_b = b;
+	p->colspec = colspec;
 	p->texture = texture;
 	p->radius = radius;
 	p->shininess = shininess;
@@ -198,6 +199,7 @@ static int model_load(ModelContext *ctx, const char *name, RenderContext *render
 	GLfloat col_r = 0.0;
 	GLfloat col_g = 0.0;
 	GLfloat col_b = 0.0;
+	GLfloat colspec = 0.0;
 	GLfloat radius = 0.0;
 	GLfloat shininess = 100.0;
 	PrimitiveAttrib attribs;
@@ -267,7 +269,7 @@ static int model_load(ModelContext *ctx, const char *name, RenderContext *render
 			if ( num_vertices > 0 ) {
 				model_add_primitive(model, type, vertices, normals, texcoords, num_vertices,
 							attribs, col_r, col_g, col_b, texture, radius, shininess,
-							render->vbos, coll);
+							render->vbos, coll, colspec);
 				num_vertices = 0;
 				type = PRIMITIVE_TRIANGLES;
 				attribs = ATTRIB_NONE;
@@ -452,6 +454,10 @@ static int model_load(ModelContext *ctx, const char *name, RenderContext *render
 			attribs = attribs | ATTRIB_COLOUR;
 			col_r = r;  col_g = g;  col_b = b;
 		}
+		if ( sscanf(line, "colspec %f %f %f", &r, &g, &b) == 3 ) {
+			attribs = attribs | ATTRIB_COLSPEC;
+			colspec = r;
+		}
 		if ( sscanf(line, "radius %f", &radius) == 1 ) {
 			attribs = attribs | ATTRIB_RADIUS;
 		}
diff --git a/src/obj2model.c b/src/obj2model.c
index a720273..9b6f9ba 100644
--- a/src/obj2model.c
+++ b/src/obj2model.c
@@ -22,6 +22,19 @@
 
 #define MAX_VERTICES 65536
 
+static char *texname(const char *filename) {
+	int i;
+	char *rval;
+	rval = strdup(filename);
+	for ( i=0; i<strlen(rval); i++ ) {
+		if ( rval[i] == '.' ) {
+			rval[i] = '\0';
+			return rval;
+		}
+	}
+	return rval;
+}
+
 static void do_material(const char *mtllib, const char *mtlname, FILE *out, char *infilename) {
 
 	FILE *fh;
@@ -66,6 +79,15 @@ static void do_material(const char *mtllib, const char *mtlname, FILE *out, char
 						if ( strcmp(bits[0], "Kd") == 0 ) {
 							fprintf(out, "colour %s %s %s\n", bits[1], bits[2], bits[3]);
 						}
+						if ( strcmp(bits[0], "Ks") == 0 ) {
+							fprintf(out, "colspec %s %s %s\n", bits[1], bits[2], bits[3]);
+						}
+						if ( strcmp(bits[0], "map_Kd") == 0 ) {
+							char *tex;
+							tex = texname(bits[1]);
+							fprintf(out, "texture %s\n", tex);
+							free(tex);
+						}
 						if ( strcmp(bits[0], "Ns") == 0 ) {
 							fprintf(out, "shiny %s\n", bits[1]);
 						}
diff --git a/src/render.c b/src/render.c
index a51e093..2a81d8d 100644
--- a/src/render.c
+++ b/src/render.c
@@ -269,8 +269,19 @@ static int render_model_instance_draw(ModelInstance *instance, Uint32 t, RenderC
 		
 		/* Set specular colour and shininess if required */
 		if ( p->attribs & ATTRIB_SHINY ) {
-			GLfloat white[] = {1.0, 1.0, 1.0, 1.0};
-			glMaterialfv(GL_FRONT, GL_SPECULAR, white);
+			GLfloat spec[4];
+			if ( p->attribs & ATTRIB_COLSPEC ) {
+				spec[0] = p->colspec;
+				spec[1] = p->colspec;
+				spec[2] = p->colspec;
+				spec[3] = 1.0;
+			} else {
+				spec[0] = 1.0;
+				spec[1] = 1.0;
+				spec[2] = 1.0;
+				spec[3] = 1.0;
+			}
+			glMaterialfv(GL_FRONT, GL_SPECULAR, spec);
 			glMaterialf(GL_FRONT, GL_SHININESS, p->shininess);
 			shaderutils_setunf(r->lighting_program, "shininess", p->shininess);
 			shaderutils_setunf(r->fill_program, "shininess", p->shininess);
diff --git a/src/types.h b/src/types.h
index 7f1119f..1304650 100644
--- a/src/types.h
+++ b/src/types.h
@@ -49,6 +49,7 @@ typedef enum {
 	ATTRIB_RADIUS	= 1<<2,		/* Radius is set */
 	ATTRIB_SHINY	= 1<<3,		/* Primitive is shiny */
 	ATTRIB_SWIRLY	= 1<<4,		/* Primitive is texture with swirlyness */
+	ATTRIB_COLSPEC  = 1<<5,		/* Specular colour specified? */
 } PrimitiveAttrib;
 
 typedef enum {
@@ -71,6 +72,7 @@ typedef struct {
 	GLfloat col_r;
 	GLfloat col_g;
 	GLfloat col_b;
+	GLfloat colspec;
 	char *texture;
 	GLfloat radius;
 	GLfloat shininess;
-- 
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