From ef74ae83db1d3049e4e890df77d25ac6e1f7719f Mon Sep 17 00:00:00 2001
From: drumsetmonkey <abelleisle@roadrunner.com>
Date: Thu, 15 Oct 2015 09:07:05 -0400
Subject: Added glew and shader loading

---
 Makefile           |  6 +++---
 include/common.h   |  3 ++-
 include/entities.h |  4 ----
 main.cpp           | 29 +++++++++++++++++++++++++++++
 shader.frag        | 13 +++++++++++++
 src/entities.cpp   |  8 ++++----
 src/ui.cpp         |  2 +-
 7 files changed, 52 insertions(+), 13 deletions(-)
 create mode 100644 shader.frag

diff --git a/Makefile b/Makefile
index 387f5f3..da4e36a 100644
--- a/Makefile
+++ b/Makefile
@@ -1,10 +1,10 @@
 LIBS = -lGL
 WIN_LIBS = -lopengl32 -lmingw32
 
-FLAGS = -m32 -std=c++11 -Iinclude -Iinclude/freetype2 -lSDL2main -lSDL2 -lfreetype -lSDL2_image -lSDL2_mixer
+FLAGS = -m32 -std=c++11 -Iinclude -Iinclude/freetype2 -lGL -lGLEW -lSDL2main -lSDL2 -lfreetype -lSDL2_image -lSDL2_mixer
 
-all:
-	@rm -f out/*.o
+all:
+	@rm -f out/*.o
 	@cd src; $(MAKE) $(MFLAGS)
 	@echo "  CXX  main.cpp"
 	@g++ $(FLAGS) -o main main.cpp out/*.o $(LIBS)
diff --git a/include/common.h b/include/common.h
index b2ef8a3..2cf98e4 100644
--- a/include/common.h
+++ b/include/common.h
@@ -8,9 +8,10 @@
 #include <math.h>
 #include <cstdlib>
 #include <SDL2/SDL.h>
+#include <GL/glew.h>
+#include <SDL2/SDL_opengl.h>
 #include <SDL2/SDL_image.h>
 #include <SDL2/SDL_mixer.h>
-#include <SDL2/SDL_opengl.h>
 
 typedef struct { float x; float y; }vec2;
 
diff --git a/include/entities.h b/include/entities.h
index fc2f35c..5b6bcf1 100644
--- a/include/entities.h
+++ b/include/entities.h
@@ -100,7 +100,3 @@ ENTITY TYPES
 <<<<<<< HEAD
 |->1 Rabbit
 **/
-=======
-|->1 Skirl
-**/
->>>>>>> 58716d5e4f20eb5a30025c88fe5119a0e40c4187
diff --git a/main.cpp b/main.cpp
index 5595c7e..a8c6cd2 100644
--- a/main.cpp
+++ b/main.cpp
@@ -48,6 +48,10 @@ unsigned int millis(void){
 
 int main(int argc, char *argv[]){
 	// Initialize SDL
+	if(glewInit() < 0){
+		std::cout << "GLEW was not able to initialize! Error: " << std::endl;
+		return -1;
+	}
 	if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO) < 0){
 		std::cout << "SDL was not able to initialize! Error: " << SDL_GetError() << std::endl;
 		return -1;
@@ -93,6 +97,31 @@ int main(int argc, char *argv[]){
 	glBlendFunc(GL_SRC_ALPHA,GL_ONE_MINUS_SRC_ALPHA);
 	SDL_ShowCursor(SDL_DISABLE);						// Hide mouse cursor so we can draw our own
 
+	/**
+	*		SHADERS
+	**/
+
+	/*GLuint fragShader;
+	GLuint shaderProgram;
+
+	const GLchar *shaderSource = "shader.frag";
+	GLint bufferln = GL_FALSE;
+
+	shaderProgram = glCreateProgram();
+	fragShader = glCreateShader(GL_FRAGMENT_SHADER);
+	glShaderSource(fragShader, 1, &shaderSource, NULL);
+	glCompileShader(fragShader);
+	glGetShaderiv(fragShader, GL_COMPILE_STATUS, &bufferln);
+	if (bufferln == GL_TRUE){
+		std::cout << "Error compiling shader" << std::endl;
+	}
+	glAttachShader(shaderProgram, fragShader);
+	glLinkProgram(shaderProgram);
+	glValidateProgram(shaderProgram);
+
+	//glEnable(GL_DEPTH_TEST);
+	//glEnable(GL_MULTISAMPLE);*/
+
 	names = fopen("assets/names_en-us", "r+");	// Open the names file
 	
 	initEverything();							// Run world maker thing in src/gameplay.cpp
diff --git a/shader.frag b/shader.frag
new file mode 100644
index 0000000..7627a12
--- /dev/null
+++ b/shader.frag
@@ -0,0 +1,13 @@
+#version 140
+
+uniform vec2 lightLocation;
+uniform vec3 lightColor;
+uniform float screenHeight;
+
+void main(){
+	float distance = length(lightLocation - gl_FragCoord.xy);
+	float attenuation = 1.0 / distance;
+	vec4 color = vec4(attenuation, attenuation, attenuation, pow(attenuation, 3)) * vec4(lightColor, 1);
+	
+	gl_FragColor = color;
+}
\ No newline at end of file
diff --git a/src/entities.cpp b/src/entities.cpp
index 0457ba1..f9bd015 100644
--- a/src/entities.cpp
+++ b/src/entities.cpp
@@ -109,10 +109,10 @@ void Entity::draw(void){		//draws the entities
 				texState-=1;
 				if(texState==0)up=true;
 			}
-		}if(ground == 0){
-			glBindTexture(GL_TEXTURE_2D, texture[1]);
 		}
-		else if(vel.x != 0){
+		if(ground == 0){
+			glBindTexture(GL_TEXTURE_2D, texture[1]);
+		}else if(vel.x != 0){
 			switch(texState){
 				case 0:
 					glBindTexture(GL_TEXTURE_2D,texture[1]);
@@ -156,7 +156,7 @@ void Entity::draw(void){		//draws the entities
 		ui::setFontSize(16);
 		ui::putText(((SCREEN_WIDTH / 2 ) + loc.x) - 125, SCREEN_HEIGHT - ui::fontSize, "Health: %d/%d",health,maxHealth);
 		glColor3ub(255,0,0);
-		glRectf((SCREEN_WIDTH / 2 + loc.x) - 125, SCREEN_HEIGHT - 32, ((SCREEN_WIDTH / 2 + loc.x) - 125) + (int)((int)(health / maxHealth) * 100), SCREEN_HEIGHT - 32 + 12);
+		glRectf((SCREEN_WIDTH / 2 + loc.x) - 125, SCREEN_HEIGHT - 32, ((SCREEN_WIDTH / 2 + loc.x) - 125) + (((float)health / (float)maxHealth) * 100), SCREEN_HEIGHT - 32 + 12);
 	}
 	if(near){
 		ui::setFontSize(14);
diff --git a/src/ui.cpp b/src/ui.cpp
index fe5414c..5c5df20 100644
--- a/src/ui.cpp
+++ b/src/ui.cpp
@@ -55,7 +55,7 @@ namespace ui {
 			abort();
 		}
 		// Load the bitmap with OpenGL
-		glActiveTexture(GL_TEXTURE0);
+		//glActiveTexture(GL_TEXTURE0);
 		glGenTextures(1,&ftex);
 		glBindTexture(GL_TEXTURE_2D,ftex);
 		glTexParameterf(GL_TEXTURE_2D,GL_TEXTURE_WRAP_S,GL_CLAMP_TO_EDGE);
-- 
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