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Grass.cpp
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Grass.cpp
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#include <GLTools.h> // OpenGL toolkit
#include <GLMatrixStack.h>
#include <GLFrame.h>
#include <GLFrustum.h>
#include <GLGeometryTransform.h>
#include "CSCIx229.h"
#include <math.h>
#ifdef __APPLE__
#include <glut/glut.h>
#else
#define FREEGLUT_STATIC
#include <GL/glut.h>
#include <GL/freeglut_ext.h>
#endif
#include <GL/glut.h>
//#include <GL/freeglut_ext.h>
#ifdef linux
#include <cstdlib>
#endif
GLFrame viewFrame;
GLFrustum viewFrustum;
GLMatrixStack modelViewMatrix;
GLMatrixStack projectionMatrix;
GLGeometryTransform transformPipeline;
GLuint grassShader; // The perspective demonstration shader
GLint locMVP; // The location of the ModelViewProjection matrix uniform
M3DVector3f vOrigin;
GLuint length_texture; //
GLuint orientation_texture;
GLuint grasspalette_texture;
GLuint grasscolor_texture;
GLuint bend_texture;
int field = 128;
float glen = 0.8;
double previousTime,fps;
int frameCount;
GLuint vao1,vao2; // The VAO
GLuint vertexBuffer; // Geometry VBO
GLuint vertexData; // VBO data
// Mouse
bool mouseleftdown = false; // True if mouse LEFT button is down.
// Saved by mouse.
float mousex, mousey; // Mouse x,y coords, in GLUT format (pixels from upper-left corner).
GLdouble projection[16];
GLdouble modelview[16];
GLint viewport[4];
M3DVector3f mpos ;
int h,w;
int obj;
float len = 1;
/* Lorenz Parameters */
double s = 20;
double b = 2.6666;
double r = 78;
float path[3];
float movex,movey;
double x = 1;
double y = 1;
double z = 1;
double dt = 0.001 ;
int X = 0;
const unsigned char grasspalette_data[] =
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0x47, 0x80, 0x00, 0x47, 0x80, 0x00, 0x46, 0x80,
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0x42, 0x80, 0x00, 0x41, 0x80, 0x00, 0x41, 0x80,
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0x80, 0x00, 0x40, 0x80, 0x00, 0x40, 0x80, 0x00,
0x3F, 0x80, 0x00, 0x3F, 0x80, 0x00, 0x3F, 0x80,
0x00, 0x3E, 0x80, 0x00, 0x3E, 0x80, 0x00, 0x3E,
0x80, 0x00, 0x3D, 0x80, 0x00, 0x3D, 0x80, 0x00,
0x3D, 0x80, 0x00, 0x3C, 0x80, 0x00, 0x3C, 0x80,
0x00, 0x3C, 0x80, 0x00, 0x3B, 0x80, 0x00, 0x3B,
0x80, 0x00, 0x3B, 0x80, 0x00, 0x3A, 0x80, 0x00,
0x3A, 0x80, 0x00, 0x3A, 0x80, 0x00, 0x39, 0x80,
0x00, 0x39, 0x80, 0x00, 0x39, 0x80, 0x00, 0x38,
0x80, 0x00, 0x38, 0x80, 0x00, 0x38, 0x80, 0x00,
0x37, 0x80, 0x00, 0x37, 0x80, 0x00, 0x37, 0x80,
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0x80, 0x00, 0x35, 0x80, 0x00, 0x35, 0x80, 0x00,
0x35, 0x80, 0x00, 0x34, 0x80, 0x00, 0x34, 0x80,
0x00, 0x34, 0x80, 0x00, 0x33, 0x80, 0x00, 0x33,
0x80, 0x00, 0x33, 0x80, 0x00, 0x32, 0x80, 0x00,
0x32, 0x80, 0x00, 0x32, 0x80, 0x00, 0x31, 0x80,
0x00, 0x31, 0x80, 0x00, 0x31, 0x80, 0x00, 0x30,
0x80, 0x00, 0x30, 0x80, 0x00, 0x30, 0x80, 0x00,
0x2F, 0x80, 0x00, 0x2F, 0x80, 0x00, 0x2F, 0x80,
0x00, 0x2E, 0x80, 0x00, 0x2E, 0x80, 0x00, 0x2E,
0x80, 0x00, 0x2D, 0x80, 0x00, 0x2D, 0x80, 0x00,
0x2D, 0x80, 0x00, 0x2C, 0x80, 0x00, 0x2C, 0x80,
0x00, 0x2C, 0x80, 0x00, 0x2B, 0x80, 0x00, 0x2B,
0x80, 0x00, 0x2B, 0x80, 0x00, 0x2A, 0x80, 0x00,
0x2A, 0x80, 0x00, 0x2A, 0x80, 0x00, 0x29, 0x80,
0x00, 0x29, 0x80, 0x00, 0x29, 0x80, 0x00, 0x28,
0x80, 0x00, 0x28, 0x80, 0x00, 0x28, 0x80, 0x00,
0x27, 0x80, 0x00, 0x27, 0x80, 0x00, 0x27, 0x80,
0x00, 0x26, 0x80, 0x00, 0x26, 0x80, 0x00, 0x26,
0x80, 0x00, 0x25, 0x80, 0x00, 0x25, 0x80, 0x00,
0x25, 0x80, 0x00, 0x24, 0x80, 0x00, 0x24, 0x80,
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0x80, 0x00, 0x23, 0x80, 0x00, 0x23, 0x80, 0x00,
0x22, 0x80, 0x00, 0x22, 0x80, 0x00, 0x22, 0x80,
0x00, 0x21, 0x80, 0x00, 0x21, 0x80, 0x00, 0x21,
0x80, 0x00, 0x20, 0x80, 0x00, 0x20, 0x80, 0x00,
0x20, 0x80, 0x00, 0x1F, 0x80, 0x00, 0x1F, 0x80,
0x00, 0x1F, 0x80, 0x00, 0x1E, 0x80, 0x00, 0x1E,
0x80, 0x00, 0x1E, 0x80, 0x00, 0x1D, 0x80, 0x00,
0x1D, 0x80, 0x00, 0x1D, 0x80, 0x00, 0x1C, 0x80,
0x00, 0x1C, 0x80, 0x00, 0x1C, 0x80, 0x00, 0x1B,
0x80, 0x00, 0x1B, 0x80, 0x00, 0x1B, 0x80, 0x00,
0x1A, 0x80, 0x00, 0x1A, 0x80, 0x00, 0x1A, 0x80,
0x00, 0x19, 0x80, 0x00, 0x19, 0x80, 0x00, 0x19,
0x80, 0x00, 0x18, 0x80, 0x00, 0x18, 0x80, 0x00,
0x18, 0x80, 0x00, 0x17, 0x80, 0x00, 0x17, 0x80,
0x00, 0x17, 0x80, 0x00, 0x16, 0x80, 0x00, 0x16,
0x80, 0x00, 0x16, 0x80, 0x00, 0x15, 0x80, 0x00,
0x15, 0x80, 0x00, 0x15, 0x80, 0x00, 0x14, 0x80,
0x00, 0x14, 0x80, 0x00, 0x14, 0x80, 0x00, 0x13,
0x80, 0x00, 0x13, 0x80, 0x00, 0x13, 0x80, 0x00,
0x12, 0x80, 0x00, 0x12, 0x80, 0x00, 0x12, 0x80,
0x00, 0x11, 0x80, 0x00, 0x11, 0x80, 0x00, 0x11,
0x80, 0x00, 0x10, 0x80, 0x00, 0x10, 0x80, 0x00,
0x10, 0x80, 0x00, 0x0F, 0x80, 0x00, 0x0F, 0x80,
0x00, 0x0F, 0x80, 0x00, 0x0E, 0x80, 0x00, 0x0E,
0x80, 0x00, 0x0E, 0x80, 0x00, 0x0D, 0x80, 0x00,
0x0D, 0x80, 0x00, 0x0D, 0x80, 0x00, 0x0C, 0x80,
0x00, 0x0C, 0x80, 0x00, 0x0C, 0x80, 0x00, 0x0B,
0x80, 0x00, 0x0B, 0x80, 0x00, 0x0B, 0x80, 0x00,
0x0A, 0x80, 0x00, 0x0A, 0x80, 0x00, 0x0A, 0x80,
0x00, 0x09, 0x80, 0x00, 0x09, 0x80, 0x00, 0x09,
0x80, 0x00, 0x09, 0x80, 0x00, 0x08, 0x80, 0x00,
0x08, 0x80, 0x00, 0x08, 0x80, 0x00, 0x07, 0x80,
0x00, 0x07, 0x80, 0x00, 0x07, 0x80, 0x00, 0x06,
0x80, 0x00, 0x06, 0x80, 0x00, 0x06, 0x80, 0x00,
0x05, 0x80, 0x00, 0x05, 0x80, 0x00, 0x05, 0x80,
0x00, 0x04, 0x80, 0x00, 0x04, 0x80, 0x00, 0x04,
0x80, 0x00, 0x03, 0x80, 0x00, 0x03, 0x80, 0x00,
0x03, 0x80, 0x00, 0x02, 0x80, 0x00, 0x02, 0x80,
0x00, 0x02, 0x80, 0x00, 0x01, 0x80, 0x00, 0x01,
0x80, 0x00, 0x01, 0x80, 0x00, 0x00, 0x80, 0x00,
0x00, 0x80, 0x00, 0x00, 0x80, 0x00, 0x00, 0x80,
0x00, 0x00, 0x80, 0x00, 0x00, 0x80, 0x00, 0x00,
0x80, 0x00, 0x00, 0x81, 0x00, 0x00, 0x81, 0x00,
0x00, 0x81, 0x00, 0x00, 0x81, 0x00, 0x00, 0x81,
0x00, 0x00, 0x81, 0x00, 0x00, 0x82, 0x00, 0x00,
0x82, 0x00, 0x00, 0x82, 0x00, 0x00, 0x82, 0x00,
0x00, 0x82, 0x00, 0x00, 0x83, 0x00, 0x00, 0x83,
0x00, 0x00, 0x83, 0x00, 0x00, 0x83, 0x00, 0x00,
0x83, 0x00, 0x00, 0x84, 0x00, 0x00, 0x84, 0x00,
0x00, 0x84, 0x00, 0x00, 0x84, 0x00, 0x00, 0x84,
0x00, 0x00, 0x84, 0x00, 0x00, 0x85, 0x00, 0x00,
0x85, 0x00, 0x00, 0x85, 0x00, 0x00, 0x85, 0x00,
0x00, 0x85, 0x00, 0x00, 0x86, 0x00, 0x00, 0x86,
0x00, 0x00, 0x86, 0x00, 0x00, 0x86, 0x00, 0x00,
0x86, 0x00, 0x00, 0x86, 0x00, 0x00, 0x87, 0x00,
0x00, 0x87, 0x00, 0x00, 0x87, 0x00, 0x00, 0x87,
0x00, 0x00, 0x87, 0x00, 0x00, 0x88, 0x00, 0x00,
0x88, 0x00, 0x00, 0x88, 0x00, 0x00, 0x88, 0x00,
0x00, 0x88, 0x00, 0x00, 0x88, 0x00, 0x00, 0x89,
0x00, 0x00, 0x89, 0x00, 0x00, 0x89, 0x00, 0x00,
0x89, 0x00, 0x00, 0x89, 0x00, 0x00, 0x8A, 0x00,
0x00, 0x8A, 0x00, 0x00, 0x8A, 0x00, 0x00, 0x8A,
0x00, 0x00, 0x8A, 0x00, 0x00, 0x8B, 0x00, 0x00,
0x8B, 0x00, 0x00, 0x8B, 0x00, 0x00, 0x8B, 0x00,
0x00, 0x8B, 0x00, 0x00, 0x8B, 0x00, 0x00, 0x8C,
0x00, 0x00, 0x8C, 0x00, 0x00, 0x8C, 0x00, 0x00,
0x8C, 0x00, 0x00, 0x8C, 0x00, 0x00, 0x8D, 0x00,
0x00, 0x8D, 0x00, 0x00, 0x8D, 0x00, 0x00, 0x8D,
0x00, 0x00, 0x8D, 0x00, 0x00, 0x8D, 0x00, 0x00,
0x8E, 0x00, 0x00, 0x8E, 0x00, 0x00, 0x8E, 0x00,
0x00, 0x8E, 0x00, 0x00, 0x8E, 0x00, 0x00, 0x8F,
0x00, 0x00, 0x8F, 0x00, 0x00, 0x8F, 0x00, 0x00,
0x8F, 0x00, 0x00, 0x8F, 0x00, 0x00, 0x90, 0x00,
0x00, 0x90, 0x00, 0x00, 0x90, 0x00, 0x00, 0x90,
0x00, 0x00, 0x90, 0x00, 0x00, 0x90, 0x00, 0x00,
0x91, 0x00, 0x00, 0x91, 0x00, 0x00, 0x91, 0x00,
0x00, 0x91, 0x00, 0x00, 0x91, 0x00, 0x00, 0x92,
0x00, 0x00, 0x92, 0x00, 0x00, 0x92, 0x00, 0x00,
0x92, 0x00, 0x00, 0x92, 0x00, 0x00, 0x92, 0x00,
0x00, 0x93, 0x00, 0x00, 0x93, 0x00, 0x00, 0x93,
0x00, 0x00, 0x93, 0x00, 0x00, 0x93, 0x00, 0x00,
0x94, 0x00, 0x00, 0x94, 0x00, 0x00, 0x94, 0x00,
0x00, 0x94, 0x00, 0x00, 0x94, 0x00, 0x00, 0x94,
0x00, 0x00, 0x95, 0x00, 0x00, 0x95, 0x00, 0x00,
0x95, 0x00, 0x00, 0x95, 0x00, 0x00, 0x95, 0x00,
0x00, 0x96, 0x00, 0x00, 0x96, 0x00, 0x00, 0x96,
0x00, 0x00, 0x96, 0x00, 0x00, 0x96, 0x00, 0x00,
0x97, 0x00, 0x00, 0x97, 0x00, 0x00, 0x97, 0x00,
0x00, 0x97, 0x00, 0x00, 0x97, 0x00, 0x00, 0x97,
0x00, 0x00, 0x98, 0x00, 0x00, 0x98, 0x00, 0x00,
0x98, 0x00, 0x00, 0x98, 0x00, 0x00, 0x98, 0x00,
0x00, 0x99, 0x00, 0x00, 0x99, 0x00, 0x00, 0x99,
0x00, 0x00, 0x99, 0x00, 0x00, 0x99, 0x00, 0x00,
0x99, 0x00, 0x00, 0x9A, 0x00, 0x00, 0x9A, 0x00,
0x00, 0x9A, 0x00, 0x00, 0x9A, 0x00, 0x00, 0x9A,
0x00, 0x00, 0x9B, 0x00, 0x00, 0x9B, 0x00, 0x00,
0x9B, 0x00, 0x00, 0x9B, 0x00, 0x00, 0x9B, 0x00,
0x00, 0x9C, 0x00, 0x00, 0x9C, 0x00, 0x00, 0x9C,
0x00, 0x00, 0x9C, 0x00, 0x00, 0x9C, 0x00, 0x00,
0x9C, 0x00, 0x00, 0x9D, 0x00, 0x00, 0x9D, 0x00,
0x00, 0x9D, 0x00, 0x00, 0x9D, 0x00, 0x00, 0x9D,
0x00, 0x00, 0x9E, 0x00, 0x00, 0x9E, 0x00, 0x00,
0x9E, 0x00, 0x00, 0x9E, 0x00, 0x00, 0x9E, 0x00,
0x00, 0x9E, 0x00, 0x00, 0x9F, 0x00, 0x00, 0x9F,
0x00, 0x00, 0x9F, 0x00, 0x00, 0x9F, 0x00, 0x00,
0x9F, 0x00, 0x00, 0xA0, 0x00, 0x00, 0xA0, 0x00,
0x00, 0xA0, 0x00, 0x00, 0xA0, 0x00, 0x00, 0xA0,
0x00, 0x00, 0xA0, 0x00, 0x00, 0xA0, 0x00, 0x00,
0xA1, 0x00, 0x00, 0xA1, 0x00, 0x00, 0xA1, 0x00,
0x00, 0xA1, 0x00, 0x00, 0xA1, 0x00, 0x00, 0xA1,
0x00, 0x00, 0xA2, 0x00, 0x00, 0xA2, 0x00, 0x00,
0xA2, 0x00, 0x00, 0xA2, 0x00, 0x00, 0xA2, 0x00,
0x00, 0xA3, 0x00, 0x00, 0xA3, 0x00, 0x00, 0xA3,
0x00, 0x00, 0xA3, 0x00, 0x00, 0xA3, 0x00, 0x00,
0xA3, 0x00, 0x00, 0xA4, 0x00, 0x00, 0xA4, 0x00,
0x00, 0xA4, 0x00, 0x00, 0xA4, 0x00, 0x00, 0xA4,
0x00, 0x00, 0xA4, 0x00, 0x00, 0xA5, 0x00, 0x00,
0xA5, 0x00, 0x00, 0xA5, 0x00, 0x00, 0xA5, 0x00,
0x00, 0xA5, 0x00, 0x00, 0xA5, 0x00, 0x00, 0xA6,
0x00, 0x00, 0xA6, 0x00, 0x00, 0xA6, 0x00, 0x00,
0xA6, 0x00, 0x00, 0xA6, 0x00, 0x00, 0xA7, 0x00,
0x00, 0xA7, 0x00, 0x00, 0xA7, 0x00, 0x00, 0xA7,
0x00, 0x00, 0xA7, 0x00, 0x00, 0xA7, 0x00, 0x00,
0xA8, 0x00, 0x00, 0xA8, 0x00, 0x00, 0xA8, 0x00,
0x00, 0xA8, 0x00, 0x00, 0xA8, 0x00, 0x00, 0xA8,
0x00, 0x00, 0xA9, 0x00, 0x00, 0xA9, 0x00, 0x00,
0xA9, 0x00, 0x00, 0xA9, 0x00, 0x00, 0xA9, 0x00,
0x00, 0xAA, 0x00, 0x00, 0xAA, 0x00, 0x00, 0xAA,
0x00, 0x00, 0xAA, 0x00, 0x00, 0xAA, 0x00, 0x00,
0xAA, 0x00, 0x00, 0xAB, 0x00, 0x00, 0xAB, 0x00,
0x00, 0xAB, 0x00, 0x00, 0xAB, 0x00, 0x00, 0xAB,
0x00, 0x00, 0xAB, 0x00, 0x00, 0xAC, 0x00, 0x00,
0xAC, 0x00, 0x00, 0xAC, 0x00, 0x00, 0xAC, 0x00,
0x00, 0xAC, 0x00, 0x00, 0xAC, 0x00, 0x00, 0xAD,
0x00, 0x00, 0xAD, 0x00, 0x00, 0xAD, 0x00, 0x00,
0xAD, 0x00, 0x00, 0xAD, 0x00, 0x00, 0xAE, 0x00,
0x00, 0xAE, 0x00, 0x00, 0xAE, 0x00, 0x00, 0xAE,
0x00, 0x00, 0xAE, 0x00, 0x00, 0xAE, 0x00, 0x00,
0xAF, 0x00, 0x00, 0xAF, 0x00, 0x00, 0xAF, 0x00,
0x00, 0xAF, 0x00, 0x00, 0xAF, 0x00, 0x00, 0xAF,
0x00, 0x00, 0xB0, 0x00, 0x00, 0xB0, 0x00, 0x00,
0xB0, 0x00, 0x00, 0xB0, 0x00, 0x00, 0xB0, 0x00,
0x00, 0xB0, 0x00, 0x00, 0xB1, 0x00, 0x00, 0xB1,
0x00, 0x00, 0xB1, 0x00, 0x00, 0xB1, 0x00, 0x00,
0xB1, 0x00, 0x00, 0xB2, 0x00, 0x00, 0xB2, 0x00,
0x00, 0xB2, 0x00, 0x00, 0xB2, 0x00, 0x00, 0xB2,
0x00, 0x00, 0xB2, 0x00, 0x00, 0xB3, 0x00, 0x00,
0xB3, 0x00, 0x00, 0xB3, 0x00, 0x00, 0xB3, 0x00,
0x00, 0xB3, 0x00, 0x00, 0xB3, 0x00, 0x00, 0xB4,
0x00, 0x00, 0xB4, 0x00, 0x00, 0xB4, 0x00, 0x00,
0xB4, 0x00, 0x00, 0xB4, 0x00, 0x00, 0xB5, 0x00,
0x00, 0xB5, 0x00, 0x00, 0xB5, 0x00, 0x00, 0xB5,
0x00, 0x00, 0xB5, 0x00, 0x00, 0xB5, 0x00, 0x00,
0xB6, 0x00, 0x00, 0xB6, 0x00, 0x00, 0xB6, 0x00,
0x00, 0xB6, 0x00, 0x00, 0xB6, 0x00, 0x00, 0xB6,
0x00, 0x00, 0xB7, 0x00, 0x00, 0xB7, 0x00, 0x00,
0xB7, 0x00, 0x00, 0xB7, 0x00, 0x00, 0xB7, 0x00,
0x00, 0xB7, 0x00, 0x00, 0xB8, 0x00, 0x00, 0xB8,
0x00, 0x00, 0xB8, 0x00, 0x00, 0xB8, 0x00, 0x00,
0xB8, 0x00, 0x00, 0xB9, 0x00, 0x00, 0xB9, 0x00,
0x00, 0xB9, 0x00, 0x00, 0xB9, 0x00, 0x00, 0xB9,
0x00, 0x00, 0xB9, 0x00, 0x00, 0xBA, 0x00, 0x00,
0xBA, 0x00, 0x00, 0xBA, 0x00, 0x00, 0xBA, 0x00,
0x00, 0xBA, 0x00, 0x00, 0xBA, 0x00, 0x00, 0xBB,
0x00, 0x00, 0xBB, 0x00, 0x00, 0xBB, 0x00, 0x00,
0xBB, 0x00, 0x00, 0xBB, 0x00, 0x00, 0xBB, 0x00,
0x00, 0xBC, 0x00, 0x00, 0xBC, 0x00, 0x00, 0xBC,
0x00, 0x00, 0xBC, 0x00, 0x00, 0xBC, 0x00, 0x00,
0xBD, 0x00, 0x00, 0xBD, 0x00, 0x00, 0xBD, 0x00,
0x00, 0xBD, 0x00, 0x00, 0xBD, 0x00, 0x00, 0xBD,
0x00, 0x00, 0xBE, 0x00, 0x00, 0xBE, 0x00, 0x00,
0xBE, 0x00, 0x00, 0xBE, 0x00, 0x00, 0xBE, 0x00,
0x00, 0xBE, 0x00, 0x00, 0xBF, 0x00, 0x00, 0xBF,
0x00, 0x00, 0xBF, 0x00, 0x00, 0xBF, 0x00, 0x00,
0xBF, 0x00, 0x00, 0xC0, 0x00, 0x00, 0xC0, 0x00,
};
// This function does any needed initialization on the rendering
// context.
void SetupRC(void)
{
// Background
glClearColor(0.2f, 0.2f, 0.2f, 1.0f );
glEnable(GL_DEPTH_TEST);
glEnable(GL_MULTISAMPLE);
glEnable(GL_SMOOTH);
glEnable( GL_ALPHA_TEST );
viewFrame.MoveForward(-30.0f); // move ahead
viewFrame.MoveUp(-50.0f); //look down
viewFrame.MoveRight(90.0f);
viewFrame.RotateWorld(m3dDegToRad(5.5f) , 1.0f, 0.0f, 0.0f);
viewFrame.RotateWorld(m3dDegToRad(8.5f) , 0.0f, -1.0f, 0.0f);
grassShader = gltLoadShaderPairWithAttributes("Grass.vs", "Grass.fs",
2,
GLT_ATTRIBUTE_VERTEX, "vVertex", GLT_ATTRIBUTE_TEXTURE0, "Vertexd");
locMVP = glGetUniformLocation(grassShader, "mvpMatrix");
glUseProgram(grassShader);
glUniform1i(glGetUniformLocation(grassShader, "length_texture"), 0);
glUniform1i(glGetUniformLocation(grassShader, "orientation_texture"), 1);
glUniform1i(glGetUniformLocation(grassShader, "grasspalette_texture"), 2);
glUniform1i(glGetUniformLocation(grassShader, "grasscolor_texture"), 3);
//glUniform1i(glGetUniformLocation(grassShader, "bend_texture"), 4);
//Model
static const GLfloat grass_blade[] =
{
-0.1f, 0.0f,
0.1f, 0.0f,
-0.07f, 2.4f,
0.07f, 2.4f,
-0.07f, 4.8f,
0.07f, 4.8f,
-0.07f, 6.1f,
0.02f, 6.2f
};
// Greate a vertex array object and a vertex buffer for the quad
// including position and texture coordinates
glGenVertexArrays(1, &vao2);
glBindVertexArray(vao2);
glGenBuffers(1, &vertexBuffer);
glBindBuffer(GL_ARRAY_BUFFER, vertexBuffer);
glBufferData(GL_ARRAY_BUFFER, sizeof(grass_blade), grass_blade, GL_STATIC_DRAW);
glVertexAttribPointer(GLT_ATTRIBUTE_VERTEX, 2, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray(GLT_ATTRIBUTE_VERTEX);
// Textures
glGenTextures(1, &length_texture);
glBindTexture(GL_TEXTURE_2D, length_texture);
GLint w, h, c;
GLenum f;
void * bits = gltReadTGABits("length.tga", &w, &h, &c, &f);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, w, h, 0, GL_BGR, GL_UNSIGNED_BYTE, bits);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
free(bits);
glGenTextures(1, &orientation_texture);
glActiveTexture(GL_TEXTURE1);
glBindTexture(GL_TEXTURE_2D, orientation_texture);
bits = gltReadTGABits("orientation.tga", &w, &h, &c, &f);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, w, h, 0, GL_BGR, GL_UNSIGNED_BYTE, bits);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
free(bits);
glGenTextures(1, &grasspalette_texture);
glActiveTexture(GL_TEXTURE2);
glBindTexture(GL_TEXTURE_1D, grasspalette_texture);
glTexImage1D(GL_TEXTURE_1D, 0, GL_RGB8, 1024, 0, GL_RGB, GL_UNSIGNED_BYTE, grasspalette_data);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_1D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glGenTextures(1, &grasscolor_texture);
glActiveTexture(GL_TEXTURE3);
glBindTexture(GL_TEXTURE_2D, grasscolor_texture);
bits = gltReadTGABits("color.tga", &w, &h, &c, &f);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, w, h, 0, GL_BGR, GL_UNSIGNED_BYTE, bits);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
free(bits);
}
//-------------------------------------------------------------------------
// Calculates the frames per second
//-------------------------------------------------------------------------
void calculateFPS()
{
// Increase frame count
frameCount++;
// Get the number of milliseconds since glutInit called
// (or first call to glutGet(GLUT ELAPSED TIME)).
double currentTime = glutGet(GLUT_ELAPSED_TIME);
// Calculate time passed
float timeInterval = currentTime - previousTime;
if(timeInterval > 1000)
{
// calculate the number of frames per second
fps = frameCount / (timeInterval / 1000.0f);
// Set time
previousTime = currentTime;
// Reset frame count
frameCount = 0;
}
printf("Blade count : %d FPS : %f\n",field*field , fps);
}
void GetOGLMousePos(GLint x, GLint y)
{
GLint viewport[4];
GLdouble modelview[16];
GLdouble projection[16];
GLfloat winX, winY, winZ;
GLdouble posX, posY, posZ;
glGetDoublev( GL_MODELVIEW_MATRIX, modelview );
glGetDoublev( GL_PROJECTION_MATRIX, projection );
glGetIntegerv( GL_VIEWPORT, viewport );
winX = (float)x;
winY = (float)viewport[3] - (float)y;
glReadPixels( x, int(winY), 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &winZ );
gluUnProject( winX, winY, winZ, modelview, projection, viewport, &posX, &posY, &posZ);
//return CVector3(posX, posY, posZ);
mpos[0] = posX;
mpos[1] = posY;
mpos[2] = posZ;
}
// Cleanup
void ShutdownRC(void)
{
glDeleteBuffers(1, &vertexBuffer);
glDeleteVertexArrays(1, &vao2);
}
// Called to draw scene
void RenderScene(void)
{
//static CStopWatch rotTimer;
// Clear the window and the depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
modelViewMatrix.PushMatrix(viewFrame);
modelViewMatrix.Translate(90.0, -15.0f, 600.0f);
glUseProgram(grassShader);
glUniformMatrix4fv(locMVP, 1, GL_FALSE, transformPipeline.GetModelViewProjectionMatrix());
glUniform1f(glGetUniformLocation(grassShader,"time"),glutGet(GLUT_ELAPSED_TIME)/1000);
viewFrame.GetOrigin(vOrigin);
glUniform3f(glGetUniformLocation(grassShader, "eyepos"),vOrigin[0],vOrigin[1],vOrigin[2]);
glUniform1f(glGetUniformLocation(grassShader,"heightscale"),glen);
GetOGLMousePos(mousex, mousey);
glUniform3f(glGetUniformLocation(grassShader, "hover1"),1.5*path[0]-110,path[1],path[2]-60);
glUniform3f(glGetUniformLocation(grassShader, "hover2"),1*movex-90,path[1],movey-40);
//printf("x=%f y=%f z=%f",mpos[0],mpos[2],mpos[1]);
glUniform4f(glGetUniformLocation(grassShader, "wind"),.5 - 2*mpos[0],2*mpos[2],.5 - 2*mpos[1],0.0);
//glBindVertexArray(vao1);
glBindVertexArray(vao2);
glDrawArraysInstancedARB(GL_TRIANGLE_STRIP, 0, 8, field * field);
modelViewMatrix.PopMatrix();
glFlush();
glutSwapBuffers();
glutPostRedisplay();
}
void ChangeSize(int w, int h)
{
// Prevent a divide by zero
if(h == 0)
h = 1;
// Set Viewport to window dimensions
glViewport(0, 0, w, h);
viewFrustum.SetPerspective(5.0f, float(w)/float(h), 1.0f, 0.0f);
projectionMatrix.LoadMatrix(viewFrustum.GetProjectionMatrix());
transformPipeline.SetMatrixStacks(modelViewMatrix, projectionMatrix);
}
// Respond to arrow keys by moving the camera frame of reference
void SpecialKeys(int key, int x, int y)
{
float angular = float(m3dDegToRad(.5f));
float angular1 = float(m3dDegToRad(.5f));
if(key == GLUT_KEY_DOWN)
viewFrame.RotateWorld(angular1, 1.0f, 0.0f, 0.0f);
if(key == GLUT_KEY_UP)
viewFrame.RotateWorld(-angular1, 1.0f, 0.0f, 0.0f);
if(key == GLUT_KEY_RIGHT)
viewFrame.RotateWorld(angular, 0.0f, 1.0f, 0.0f);
if(key == GLUT_KEY_LEFT)
viewFrame.RotateWorld(-angular, 0.0f, 1.0f, 0.0f);
}
void KeyPress(unsigned char key, int x, int y)
{
float movement = 1;
if( key == 'l')
glen -= 0.01;
if( key == 'L')
glen += 0.01;
if( key == 'w' || key == 'W')
movey +=movement;
if( key == 's' || key == 'S')
movey -=movement;
if( key == 'a'|| key == 'A')
movex +=movement;
if( key == 'd' || key == 'D')
movex -=movement;
if( key == 'M' || key == 'm')
X = 1-X ;
if( key == '+')
field++;
if( key == '-')
field--;
if ( key == 27 || key == 'q' || key == 'Q' ) // quit requested
exit ( 0 );
}
// mouse
// The GLUT mouse function
void mouse(int button, int state, int x, int y)
{
// Save the left button state
if (button == GLUT_LEFT_BUTTON)
{
mousex = x;
mousey = y;
mouseleftdown = (state == GLUT_DOWN);
glutPostRedisplay(); // Left button has changed; redisplay!
}
// Save the mouse position
}
void animate ()
{
if(X==1){
double dx = s*(y-x);
double dy = x*(r-z)-y;
double dz = x*y - b*z;
x += dt*dx;
y += dt*dy;
z += dt*dz;
path[0] = x;
path[1] = y;
path[2] = z;
}
// Calculate FPS
calculateFPS();
glutPostRedisplay ();
}
///////////////////////////////////////////////////////////////////////////////
// Main entry point for GLUT based programs
int main(int argc, char* argv[])
{
gltSetWorkingDirectory(argv[0]);
glutInit(&argc, argv);
glutInitContextVersion(3, 2);
glutInitContextProfile(GLUT_CORE_PROFILE);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH | GLUT_STENCIL | GLUT_MULTISAMPLE);
w = 1200 ; h = 760;
glutInitWindowSize(w, h);
glutCreateWindow("Grass- Tushar");
glutDisplayFunc(RenderScene);
glutKeyboardFunc(KeyPress);
glutSpecialFunc(SpecialKeys);
glutReshapeFunc(ChangeSize);
//glutKeyboardFunc(Keyboard);
glutMouseFunc(mouse);
glutIdleFunc ( animate );
//glutMotionFunc(motion);
glewExperimental = GL_TRUE;
GLenum err = glewInit();
if (GLEW_OK != err) {
fprintf(stderr, "GLEW Error: %s\n", glewGetErrorString(err));
return 1;
}
SetupRC();
glutMainLoop();
ShutdownRC();
return 0;
}