OPENGL编程宝典-6.9

  Test test...简单说两句.刚刚自己写了个ADS光照模型,就是,环境光,漫反射,镜面反射这3个分量共同影响顶点的光照.写的是顶点着色器,简单说两句.

  凭借着前一阵对固定流水线的学习,学习这个真心简单,哈哈!只要写好对每个顶点的处理,包括坐标系变换,光照计算,之后就继续交给流水线去完成.思绪清晰了好多,相信随着接下来的继续学习,会游刃有余的吧.咳,也确实,这东西不自己写一遍,光是看,毛用都没有.也真心觉得,没有往我CPU流水线里加裁剪之后的东西,为了做事的话,为了研究的话,这个也不错~

  话说今天是周五,最近两天感冒刚好,前几天感冒,使劲咳嗽,总算是好咯~下周就要开始新的工作了,最近一段时间研究了下骨骼动画,贴图,这方面的东西.嗨呀~挺累的~

  还要找个非常廉价的床位住,生活真心不易啊~期待换工作顺利吧.毕竟这边经常挽留,我也没激动地回答什么,真的假的,为了什么,感情因素,自己判断吧.

  呼~这书看得挺快的,挤压油吧!

  ...忘记贴代码.,...补上...二啊!!

#include "stdafx.h"
#include <GLTools.h>	// OpenGL toolkit
#include <GLMatrixStack.h>
#include <GLFrame.h>
#include <GLFrustum.h>
#include <GLGeometryTransform.h>
#include <StopWatch.h>

#include <math.h>
#ifdef __APPLE__
#include <glut/glut.h>
#else
#define FREEGLUT_STATIC
#include <GL/glut.h>
#endif

GLFrame viewFrame;
GLFrustum viewFrustum;
GLTriangleBatch sphereBatch;
GLMatrixStack modelViewMatrix;
GLMatrixStack projectionMatrix;
GLGeometryTransform transformPipeline;
GLShaderManager shaderManager;

GLuint ADSLightShader;	
GLint	locAmbient;		
GLint locDiffuse;		
GLint locSpecular;		
GLint locLight;			
GLint	locMVP;				
GLint	locMV;				
GLint	locNM;				

void SetupRC(void)
{
	glClearColor(0.0f, 0.0f, 0.0f, 1.0f );

	glEnable(GL_DEPTH_TEST);
	glEnable(GL_CULL_FACE);

    shaderManager.InitializeStockShaders();
    viewFrame.MoveForward(4.0f);

    gltMakeSphere(sphereBatch, 1.0f, 26, 13);

	ADSLightShader = shaderManager.LoadShaderPairWithAttributes("ADSGouraud.vp", "ADSGouraud.fp", 2, GLT_ATTRIBUTE_VERTEX, "vVertex",
			GLT_ATTRIBUTE_NORMAL, "vNormal");

	locAmbient = glGetUniformLocation(ADSLightShader, "ambientColor");
	locDiffuse = glGetUniformLocation(ADSLightShader, "diffuseColor");
	locSpecular = glGetUniformLocation(ADSLightShader, "specularColor");
	locLight = glGetUniformLocation(ADSLightShader, "lightPosition");
	locMVP = glGetUniformLocation(ADSLightShader, "mvpMatrix");
	locMV  = glGetUniformLocation(ADSLightShader, "mvMatrix");
	locNM  = glGetUniformLocation(ADSLightShader, "normalMatrix");
}

void ShutdownRC(void)
{
}

void RenderScene(void)
{
	static CStopWatch rotTimer;

	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
		
    modelViewMatrix.PushMatrix(viewFrame);
	modelViewMatrix.Rotate(rotTimer.GetElapsedSeconds() * 10.0f, 0.0f, 1.0f, 0.0f);

	GLfloat vEyeLight[] = { -100.0f, 100.0f, 100.0f };
	GLfloat vAmbientColor[] = { 0.1f, 0.1f, 0.1f, 1.0f };
	GLfloat vDiffuseColor[] = { 0.0f, 0.0f, 1.0f, 1.0f };
	GLfloat vSpecularColor[] = { 1.0f, 1.0f, 1.0f, 1.0f };

	glUseProgram(ADSLightShader);
	glUniform4fv(locAmbient, 1, vAmbientColor);
	glUniform4fv(locDiffuse, 1, vDiffuseColor);
	glUniform4fv(locSpecular, 1, vSpecularColor);
	glUniform3fv(locLight, 1, vEyeLight);
	glUniformMatrix4fv(locMVP, 1, GL_FALSE, transformPipeline.GetModelViewProjectionMatrix());
	glUniformMatrix4fv(locMV, 1, GL_FALSE, transformPipeline.GetModelViewMatrix());
	glUniformMatrix3fv(locNM, 1, GL_FALSE, transformPipeline.GetNormalMatrix());
    sphereBatch.Draw();

    modelViewMatrix.PopMatrix();

    glutSwapBuffers();
	glutPostRedisplay();
}

void ChangeSize(int w, int h)
{
	if(h == 0)
		h = 1;

    glViewport(0, 0, w, h);

    viewFrustum.SetPerspective(35.0f, float(w)/float(h), 1.0f, 100.0f);
    
    projectionMatrix.LoadMatrix(viewFrustum.GetProjectionMatrix());
    transformPipeline.SetMatrixStacks(modelViewMatrix, projectionMatrix);
}

int main(int argc, char* argv[])
{
	gltSetWorkingDirectory(argv[0]);
	
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH | GLUT_STENCIL);
	glutInitWindowSize(800, 600);
	glutCreateWindow("ADS Lighting, Gouraud Shading");
    glutReshapeFunc(ChangeSize);
    glutDisplayFunc(RenderScene);

	GLenum err = glewInit();
	if (GLEW_OK != err) {
		fprintf(stderr, "GLEW Error: %s\n", glewGetErrorString(err));
		return 1;
    }
	
	SetupRC();    
	glutMainLoop();
	ShutdownRC();
	return 0;
}