You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
123 lines
3.1 KiB
123 lines
3.1 KiB
//
|
|
// Game.m
|
|
// iOSGLEssentials
|
|
//
|
|
// Created by Joshua Moerman on 08/03/14.
|
|
//
|
|
//
|
|
|
|
#import "Game.h"
|
|
@import GLKit;
|
|
|
|
#ifdef ESSENTIAL_GL_PRACTICES_IOS
|
|
#define glBindVertexArray glBindVertexArrayOES
|
|
#define glGenVertexArrays glGenVertexArraysOES
|
|
#define glDeleteVertexArrays glDeleteVertexArraysOES
|
|
#endif
|
|
|
|
#define BUFFER_OFFSET(i) ((char *)NULL + (i))
|
|
|
|
|
|
#ifdef ESSENTIAL_GL_PRACTICES_IOS
|
|
NSString * file = @"Fractal-iOS";
|
|
#else
|
|
NSString * file = @"Fractal";
|
|
#endif
|
|
|
|
const GLfloat quad[] = {
|
|
// x y z, r g b
|
|
1, -1, 0, 1, 0, 0,
|
|
-1, -1, 0, 0, 1, 0,
|
|
1, 1, 0, 0, 0, 1,
|
|
-1, 1, 0, 1, 1, 1
|
|
};
|
|
|
|
static void check_shader(GLuint s){
|
|
GLint logLength;
|
|
glGetShaderiv(s, GL_INFO_LOG_LENGTH, &logLength);
|
|
if (logLength > 0) {
|
|
GLchar *log = (GLchar *)malloc(logLength);
|
|
glGetShaderInfoLog(s, logLength, &logLength, log);
|
|
NSLog(@"Shader compile log:\n%s", log);
|
|
free(log);
|
|
}
|
|
}
|
|
|
|
@implementation Game{
|
|
float time;
|
|
GLuint program;
|
|
GLint uniform;
|
|
GLuint vao;
|
|
GLuint posBufferName;
|
|
}
|
|
|
|
- (id)init{
|
|
if(self = [super init]){
|
|
time = 0;
|
|
program = glCreateProgram();
|
|
|
|
NSError * error = nil;
|
|
|
|
NSString * vs = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:file ofType:@"vsh"] encoding:NSASCIIStringEncoding error:&error];
|
|
NSString * fs = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:file ofType:@"fsh"] encoding:NSASCIIStringEncoding error:nil];
|
|
|
|
GLchar const * vs_cstr = [vs UTF8String];
|
|
GLchar const * fs_cstr = [fs UTF8String];
|
|
|
|
GLuint v = glCreateShader(GL_VERTEX_SHADER);
|
|
glShaderSource(v, 1, &vs_cstr, NULL);
|
|
glCompileShader(v);
|
|
check_shader(v);
|
|
|
|
GLuint f = glCreateShader(GL_FRAGMENT_SHADER);
|
|
glShaderSource(f, 1, &fs_cstr, NULL);
|
|
glCompileShader(f);
|
|
check_shader(f);
|
|
|
|
glAttachShader(program, v);
|
|
glAttachShader(program, f);
|
|
|
|
glBindAttribLocation(program, 0, "position");
|
|
glBindAttribLocation(program, 1, "color");
|
|
|
|
glLinkProgram(program);
|
|
|
|
uniform = glGetUniformLocation(program, "rotation");
|
|
|
|
glDetachShader(program, v);
|
|
glDeleteShader(v);
|
|
glDetachShader(program, f);
|
|
glDeleteShader(f);
|
|
|
|
glGenVertexArrays(1, &vao);
|
|
glBindVertexArray(vao);
|
|
|
|
glGenBuffers(1, &posBufferName);
|
|
glBindBuffer(GL_ARRAY_BUFFER, posBufferName);
|
|
glBufferData(GL_ARRAY_BUFFER, 4*6*4, quad, GL_STATIC_DRAW);
|
|
|
|
glEnableVertexAttribArray(0);
|
|
glEnableVertexAttribArray(1);
|
|
|
|
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6*4, BUFFER_OFFSET(0));
|
|
glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6*4, BUFFER_OFFSET(3*4));
|
|
}
|
|
return self;
|
|
}
|
|
|
|
- (void)update:(float)dt{
|
|
time += dt;
|
|
}
|
|
|
|
- (void)draw{
|
|
glClearColor(0.65f, 0.65f, 0.65f, 1.0f);
|
|
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
|
|
|
glUseProgram(program);
|
|
glUniform1f(uniform, time);
|
|
glBindVertexArray(vao);
|
|
|
|
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
|
|
}
|
|
|
|
@end
|
|
|