From e172cde8c082fa3e338b3eb11079b36952874936 Mon Sep 17 00:00:00 2001
From: Jon Bergli Heier <snakebite@jvnv.net>
Date: Fri, 1 Apr 2011 23:07:56 +0200
Subject: Terrain shader lighting - work in progress.

---
 main.cpp | 48 +++++++++++++++++++++++++++++++-----------------
 1 file changed, 31 insertions(+), 17 deletions(-)

(limited to 'main.cpp')

diff --git a/main.cpp b/main.cpp
index 9f3bf15..cf7c3b9 100644
--- a/main.cpp
+++ b/main.cpp
@@ -2,6 +2,7 @@
 #include "scene.h"
 #include "vector.h"
 #include "quadtree.h"
+#include "shader.h"
 
 #include <SDL_image.h>
 #include <FTGL/ftgl.h>
@@ -123,6 +124,12 @@ int main(int argc, char **argv) {
 	video::width = 1280;
 	video::height = 720;
 	video::init();
+	GLShaderProgram program;
+	GLVertexShader terrain_vertex("terrain_vertex.glsl");
+	GLFragmentShader terrain_fragment("terrain_fragment.glsl");
+	program.attach(terrain_vertex);
+	program.attach(terrain_fragment);
+	program.link();
 
 	font = new FTTextureFont("font.ttf");
 	font->FaceSize(10);
@@ -139,6 +146,7 @@ int main(int argc, char **argv) {
 	Quadtree *qt = new Quadtree(hm->w, hm->h, heightmap, level);
 	//Quadtree qt(qt_size, qt_size, (int)ceil(sqrt(qt_size)));
 
+
 	GLuint grass_texture;
 	{
 		SDL_Surface *surface = IMG_Load("Grass0073_3_S.jpg");
@@ -153,7 +161,7 @@ int main(int argc, char **argv) {
 		glGenTextures(1, &grass_texture);
 		glBindTexture(GL_TEXTURE_2D, grass_texture);
 		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
-		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 		if(image->format->Amask) {
 			//glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, image->w, image->h, 0, GL_RGBA, GL_UNSIGNED_BYTE, image->pixels);
 			gluBuild2DMipmaps(GL_TEXTURE_2D, 4, image->w, image->h, GL_RGBA, GL_UNSIGNED_BYTE, image->pixels);
@@ -170,6 +178,7 @@ int main(int argc, char **argv) {
 	SDL_Event event;
 	bool running = true;
 	bool grid = false;
+	bool gravity = true;
 	SDL_WarpMouse(video::width/2, video::height/2);
 	unsigned int last_time = SDL_GetTicks();
 	/*boost::timer t;
@@ -211,6 +220,9 @@ int main(int argc, char **argv) {
 						case SDLK_SPACE:
 							scene.yvel = .05;
 							break;
+						case SDLK_h:
+							gravity = !gravity;
+							break;
 						default:
 							break;
 					}
@@ -271,7 +283,7 @@ int main(int argc, char **argv) {
 			right++;
 		}
 		if(keystate[SDLK_q])
-			scene.pos.y -= 0.002*steps;
+			scene.pos.y -= 0.002*steps*(keystate[SDLK_LSHIFT]?10:1);
 		if(keystate[SDLK_e])
 			scene.pos.y += 0.002*steps*(keystate[SDLK_LSHIFT]?10:1);
 		if(moved && (forward || right))
@@ -280,27 +292,30 @@ int main(int argc, char **argv) {
 		std::string move_str;
 		Quadtree::QuadNode *node = qt->find(scene.pos.x, scene.pos.z);
 		if(node) {
-			float y = node->get_height(scene.pos.x, scene.pos.z);
-			if(scene.pos.y > y && !keystate[SDLK_e])
-				scene.yvel -= 9.81 * steps / 85000;
-			if(scene.yvel < -.5)
-				scene.yvel = -.5;
-			scene.pos.y += scene.yvel * steps;
-			if(scene.pos.y < y) {
-				scene.pos.y = y;
-				scene.yvel = 0;
+			if(gravity) {
+				float y = node->get_height(scene.pos.x, scene.pos.z);
+				if(scene.pos.y > y && !keystate[SDLK_e])
+					scene.yvel -= 9.81 * steps / 85000;
+				if(scene.yvel < -.5)
+					scene.yvel = -.5;
+				scene.pos.y += scene.yvel * steps;
+				if(scene.pos.y < y) {
+					scene.pos.y = y;
+					scene.yvel = 0;
+				}
 			}
-			move_str = (boost::format("%s %.2f,%.2f %dx%d %d") % scene.pos.str() % node->x % node->y % node->width % node->height % node->level).str();
+			move_str = (boost::format("%s %.2f,%.2f %.2fx%.2f %d") % scene.pos.str() % node->x % node->y % node->width % node->height % node->level).str();
 		}
 
 		scene.lookat();
 
 		glEnable(GL_LIGHTING);
-		//const float light_pos[4] = {50, 20, 50, 1};
-		const float light_pos[4] = {0, 1, 0, 0};
+		const float light_pos[4] = {50, 100, 50, 1};
+		//const float light_pos[4] = {0, 1, 0, 0};
 		glLightfv(GL_LIGHT0, GL_POSITION, light_pos);
 
 		if(!grid) {
+			program.use();
 			glBindTexture(GL_TEXTURE_2D, grass_texture);
 			glEnable(GL_TEXTURE_2D);
 			glBindBuffer(GL_ARRAY_BUFFER, qt->vbo_object);
@@ -314,11 +329,11 @@ int main(int argc, char **argv) {
 			glDisableClientState(GL_VERTEX_ARRAY);
 			glDisableClientState(GL_NORMAL_ARRAY);
 			glDisableClientState(GL_TEXTURE_COORD_ARRAY);
+			glDisable(GL_TEXTURE_2D);
+			glUseProgram(0);
 		} else {
 			std::queue<Quadtree::QuadNode*> q;
 			q.push(qt->root);
-			glBindTexture(GL_TEXTURE_2D, grass_texture);
-			glEnable(GL_TEXTURE_2D);
 			while(!q.empty()) {
 				Quadtree::QuadNode *node = q.front();
 				q.pop();
@@ -330,7 +345,6 @@ int main(int argc, char **argv) {
 			}
 		}
 
-		glDisable(GL_TEXTURE_2D);
 		glDisable(GL_LIGHTING);
 
 		float px, py, pz;
-- 
cgit v1.2.3