OpenGL实现物体移动

#include <GLTools.h> #include <GLShaderManager.h> #include <GLFrustum.h> #include <GLBatch.h> #include <GLFrame.h> #include <GLMatrixStack.h> #include <GLGeometryTransform.h> #include <GL/glut.h> GLBatch floorBatch; GLBatch cubeBatch; GLShaderManager shaderManager; GLMatrixStack projectionMatrix; GLMatrixStack modelViewMatrix; GLFrustum viewFrustum; GLFrame cameraFrameFloor; GLFrame cameraFrameObject; GLFrame objectFrame; GLGeometryTransform transformPipeline; GLint myShader; GLint locMVP; GLint locColor; GLfloat floorColor[] = {1, 0, 0, 1}; GLfloat cubeColor[] = {1, 1, 0, 1}; void SetupRC() { glClearColor(0.5f, 0.0f, 0.7f, 1.0f); glEnable(GL_DEPTH_TEST); //glPolygonMode(GL_FRONT_AND_BACK, GL_LINE); shaderManager.InitializeStockShaders(); floorBatch.Begin(GL_LINES, 484); for (GLfloat x = -30.0; x <= 30.0f; x += 0.5) { floorBatch.Vertex3f(x, -0.55f, 30.0f); floorBatch.Vertex3f(x, -0.55f, -30.0f); floorBatch.Vertex3f(30, -0.55f, x); floorBatch.Vertex3f(-30, -0.55f, x); } floorBatch.End(); gltMakeCube(cubeBatch, 0.5); cameraFrameFloor.MoveForward(-6.0f); cameraFrameObject.MoveForward(-6.0f); myShader = gltLoadShaderPairWithAttributes("shader.vp", "shader.fp", 1, GLT_ATTRIBUTE_VERTEX, "vVertex"); locMVP = glGetUniformLocation(myShader, "mvpMatrix"); locColor = glGetUniformLocation(myShader, "vColorValue"); } void ChangeSize(int nWidth, int nHeight) { glViewport(0, 0, nWidth, nHeight); viewFrustum.SetPerspective(35.0f, GLfloat(nWidth) / nHeight, 1.0f, 100.0f); projectionMatrix.LoadMatrix(viewFrustum.GetProjectionMatrix()); transformPipeline.SetMatrixStacks(modelViewMatrix, projectionMatrix); } void RenderScene(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); M3DMatrix44f mCamera; M3DMatrix44f mObject; modelViewMatrix.PushMatrix(); cameraFrameFloor.GetMatrix(mCamera); modelViewMatrix.MultMatrix(mCamera); objectFrame.GetMatrix(mObject); //modelViewMatrix.MultMatrix(mObject); glUseProgram(myShader); glUniformMatrix4fv(locMVP, 1, GL_FALSE, transformPipeline.GetModelViewProjectionMatrix()); glUniform4fv(locColor, 1, floorColor); floorBatch.Draw(); modelViewMatrix.PopMatrix(); modelViewMatrix.PushMatrix(); cameraFrameObject.GetCameraMatrix(mCamera); modelViewMatrix.MultMatrix(mCamera); // objectFrame.GetMatrix(mObject); // modelViewMatrix.MultMatrix(mObject); glUseProgram(myShader); glUniformMatrix4fv(locMVP, 1, GL_FALSE, transformPipeline.GetModelViewProjectionMatrix()); glUniform4fv(locColor, 1, cubeColor); cubeBatch.Draw(); modelViewMatrix.PopMatrix(); glutSwapBuffers(); glutPostRedisplay(); } void SpecialKeys(int key, int x, int y) { switch (key) { case GLUT_KEY_UP: cameraFrameObject.MoveForward(-1.0f); objectFrame.MoveForward(-1.0f); break; case GLUT_KEY_DOWN: cameraFrameObject.MoveForward(1.0f); objectFrame.MoveForward(1.0f); break; case GLUT_KEY_LEFT: cameraFrameObject.RotateWorld(m3dDegToRad(-2.0f), 0.0f, 1.0f, 0.0f); cameraFrameFloor.RotateWorld(m3dDegToRad(-2.0f), 0.0f, 1.0f, 0.0f); break; case GLUT_KEY_RIGHT: cameraFrameObject.RotateWorld(m3dDegToRad(2.0f), 0.0f, 1.0f, 0.0f); cameraFrameFloor.RotateWorld(m3dDegToRad(2.0f), 0.0f, 1.0f, 0.0f); break; default: break; } glutPostRedisplay(); } void ShutDownRC() { glDeleteShader(myShader); } int main(int argc, char* argv[]) { gltSetWorkingDirectory(argv[0]); glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGBA | GLUT_DEPTH); glutInitWindowSize(800, 600); glutCreateWindow("MoveObject"); glutReshapeFunc(ChangeSize); glutDisplayFunc(RenderScene); glutSpecialFunc(SpecialKeys); GLenum err = glewInit(); if (GLEW_OK != err) { fprintf(stderr, "GLEW Error: %s\n", glewGetErrorString(err)); return 1; } SetupRC(); glutMainLoop(); ShutDownRC(); return 0; }