From 671a686311e6246c6708b38e6785f3de15497309 Mon Sep 17 00:00:00 2001
From: neoraider <devnull@localhost>
Date: Wed, 22 Nov 2006 22:33:04 +0000
Subject: Render-Funktion optimiert; Fehler in der Beleuchtungsfunktion behoben

---
 init.c   |  2 +-
 render.c | 45 +++++++++++++++++++++++++++++++++------------
 2 files changed, 34 insertions(+), 13 deletions(-)

diff --git a/init.c b/init.c
index defc60e..b799e77 100644
--- a/init.c
+++ b/init.c
@@ -15,7 +15,7 @@ GLuint lightmap;
 extern TEXLIST *texlist;
 
 int InitGame() {
-	LIGHT light = {LIGHT_POINT, {30.0, 30.0, 30.0}, {0.0, 0.0, 0.0}};
+	LIGHT light = {LIGHT_POINT, {15.0, 15.0, 15.0}, {0.0, 0.0, 0.0}};
 	COLOR ambient = {0.1, 0.1, 0.1};
 	
 	
diff --git a/render.c b/render.c
index e260166..7500281 100644
--- a/render.c
+++ b/render.c
@@ -18,6 +18,10 @@ extern COLOR ambient;
 extern GLuint lightmap;
 
 
+static int SortByTex(const void *p1, const void *p2) {
+	return ((POLYGON*)p1)->texture - ((POLYGON*)p2)->texture;
+}
+
 void Render() {
 	GLfloat std_emission[] = {0.0, 0.0, 0.0, 1.0};
 	MATRIX rotate = {
@@ -32,6 +36,7 @@ void Render() {
 	VECTOR v, v1, v2;
 	VERTEX p;
 	COLOR c;
+	GLint last_tex;
 	
 	
 	glLoadIdentity();
@@ -43,6 +48,7 @@ void Render() {
 	glTranslatef(-player.pos.x, -player.pos.y, -player.pos.z);
 	
 	room = DrawRoom(&level, player.room);
+	qsort(room->polygons, room->nPolygons, sizeof(POLYGON), SortByTex);
 	
 	glDepthMask(GL_TRUE);
 	glDepthFunc(GL_LESS);
@@ -57,10 +63,17 @@ void Render() {
 	glDisable(GL_TEXTURE_2D);
 	glActiveTexture(GL_TEXTURE0);
 	
+	glBindTexture(GL_TEXTURE_2D, room->polygons[0].texture);
+	last_tex = room->polygons[0].texture;
+	glBegin(GL_TRIANGLES);
+	
 	for(i = 0; i < room->nPolygons; i++) {
-		glBindTexture(GL_TEXTURE_2D, room->polygons[i].texture);
-		
-		glBegin(GL_TRIANGLES);
+		if(last_tex != room->polygons[i].texture) {
+			glEnd();
+			glBindTexture(GL_TEXTURE_2D, room->polygons[i].texture);
+			last_tex = room->polygons[i].texture;
+			glBegin(GL_TRIANGLES);
+		}
 		
 		glMultiTexCoord2fv(0, (GLfloat*)&room->polygons[i].texcoords[0]);
 		glVertex3fv((GLfloat*)&room->polygons[i].vertices[0]);
@@ -69,9 +82,11 @@ void Render() {
 		glMultiTexCoord2fv(0, (GLfloat*)&room->polygons[i].texcoords[2]);
 		glVertex3fv((GLfloat*)&room->polygons[i].vertices[2]);
 		
-		glEnd();
+		
 	}
 	
+	glEnd();
+	
 	glDepthFunc(GL_EQUAL);
 	glDepthMask(GL_FALSE);
 	
@@ -84,15 +99,23 @@ void Render() {
 	glEnable(GL_TEXTURE_2D);
 	
 	for(i = 0; i < nLights; i++) {
+		glBindTexture(GL_TEXTURE_2D, room->polygons[0].texture);
+		last_tex = room->polygons[0].texture;
+		
+		glBegin(GL_TRIANGLES);
+		
 		for(j = 0; j < room->nPolygons; j++) {
-			glBindTexture(GL_TEXTURE_2D, room->polygons[j].texture);
-			
-			glBegin(GL_TRIANGLES);
+			if(last_tex != room->polygons[j].texture) {
+				glEnd();
+				glBindTexture(GL_TEXTURE_2D, room->polygons[j].texture);
+				last_tex = room->polygons[j].texture;
+				glBegin(GL_TRIANGLES);
+			}
 			
 			d = VectorDot(room->polygons[j].normal, VectorSub(room->polygons[j].vertices[0], lights[i].pos));
 			
 			if(d < 0) {
-				c = VectorMul(lights[i].diffuse, 1.0/((nLights+1)*d*d));
+				c = VectorMul(lights[i].diffuse, 1.0/(d*d));
 				glColor3fv((GLfloat*)&c);
 				
 				p = VectorAdd(lights[i].pos, VectorMul(room->polygons[j].normal, d));
@@ -108,15 +131,13 @@ void Render() {
 					glVertex3fv((GLfloat*)&room->polygons[j].vertices[k]);
 				}
 			}
-			
-			glEnd();
 		}
+		
+		glEnd();
 	}
 	
 	free(room);
 	
-	//ApplyLightScale();
-	
 	/*glPushMatrix();
 	glDisable(GL_TEXTURE_2D);
 	glColor3f(1.0, 1.0, 1.0);
-- 
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