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Diffstat (limited to 'progs/glsl/bump.c')
-rw-r--r-- | progs/glsl/bump.c | 347 |
1 files changed, 0 insertions, 347 deletions
diff --git a/progs/glsl/bump.c b/progs/glsl/bump.c deleted file mode 100644 index 784596448c..0000000000 --- a/progs/glsl/bump.c +++ /dev/null @@ -1,347 +0,0 @@ -/** - * Procedural Bump Mapping demo. Uses the example shaders from - * chapter 11 of the OpenGL Shading Language "orange" book. - * 16 Jan 2007 - */ - -#include <assert.h> -#include <string.h> -#include <stdio.h> -#include <stdlib.h> -#include <math.h> -#include <GL/glew.h> -#include <GL/glut.h> -#include "shaderutil.h" -#include "readtex.h" - - -static char *FragProgFile = "CH11-bumpmap.frag"; -static char *FragTexProgFile = "CH11-bumpmaptex.frag"; -static char *VertProgFile = "CH11-bumpmap.vert"; -static char *TextureFile = "../images/tile.rgb"; - -/* program/shader objects */ -static GLuint fragShader; -static GLuint fragTexShader; -static GLuint vertShader; -static GLuint program; -static GLuint texProgram; - - -static struct uniform_info Uniforms[] = { - { "LightPosition", 1, GL_FLOAT_VEC3, { 0.57737, 0.57735, 0.57735, 0.0 }, -1 }, - { "SurfaceColor", 1, GL_FLOAT_VEC3, { 0.8, 0.8, 0.2, 0 }, -1 }, - { "BumpDensity", 1, GL_FLOAT, { 10.0, 0, 0, 0 }, -1 }, - { "BumpSize", 1, GL_FLOAT, { 0.125, 0, 0, 0 }, -1 }, - { "SpecularFactor", 1, GL_FLOAT, { 0.5, 0, 0, 0 }, -1 }, - END_OF_UNIFORMS -}; - -static struct uniform_info TexUniforms[] = { - { "LightPosition", 1, GL_FLOAT_VEC3, { 0.57737, 0.57735, 0.57735, 0.0 }, -1 }, - { "Tex", 1, GL_INT, { 0, 0, 0, 0 }, -1 }, - { "BumpDensity", 1, GL_FLOAT, { 10.0, 0, 0, 0 }, -1 }, - { "BumpSize", 1, GL_FLOAT, { 0.125, 0, 0, 0 }, -1 }, - { "SpecularFactor", 1, GL_FLOAT, { 0.5, 0, 0, 0 }, -1 }, - END_OF_UNIFORMS -}; - -static GLint win = 0; - -static GLfloat xRot = 20.0f, yRot = 0.0f, zRot = 0.0f; - -static GLint tangentAttrib; - -static GLuint Texture; - -static GLboolean Anim = GL_FALSE; -static GLboolean Textured = GL_FALSE; - - -static void -CheckError(int line) -{ - GLenum err = glGetError(); - if (err) { - printf("GL Error %s (0x%x) at line %d\n", - gluErrorString(err), (int) err, line); - } -} - -/* - * Draw a square, specifying normal and tangent vectors. - */ -static void -Square(GLfloat size) -{ - glNormal3f(0, 0, 1); - glVertexAttrib3f(tangentAttrib, 1, 0, 0); - glBegin(GL_POLYGON); - glTexCoord2f(0, 0); glVertex2f(-size, -size); - glTexCoord2f(1, 0); glVertex2f( size, -size); - glTexCoord2f(1, 1); glVertex2f( size, size); - glTexCoord2f(0, 1); glVertex2f(-size, size); - glEnd(); -} - - -static void -Cube(GLfloat size) -{ - /* +X */ - glPushMatrix(); - glRotatef(90, 0, 1, 0); - glTranslatef(0, 0, size); - Square(size); - glPopMatrix(); - - /* -X */ - glPushMatrix(); - glRotatef(-90, 0, 1, 0); - glTranslatef(0, 0, size); - Square(size); - glPopMatrix(); - - /* +Y */ - glPushMatrix(); - glRotatef(90, 1, 0, 0); - glTranslatef(0, 0, size); - Square(size); - glPopMatrix(); - - /* -Y */ - glPushMatrix(); - glRotatef(-90, 1, 0, 0); - glTranslatef(0, 0, size); - Square(size); - glPopMatrix(); - - - /* +Z */ - glPushMatrix(); - glTranslatef(0, 0, size); - Square(size); - glPopMatrix(); - - /* -Z */ - glPushMatrix(); - glRotatef(180, 0, 1, 0); - glTranslatef(0, 0, size); - Square(size); - glPopMatrix(); - -} - - -static void -Idle(void) -{ - GLint t = glutGet(GLUT_ELAPSED_TIME); - yRot = t * 0.05; - glutPostRedisplay(); -} - - -static void -Redisplay(void) -{ - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - - glPushMatrix(); - glRotatef(xRot, 1.0f, 0.0f, 0.0f); - glRotatef(yRot, 0.0f, 1.0f, 0.0f); - glRotatef(zRot, 0.0f, 0.0f, 1.0f); - - if (Textured) - glUseProgram(texProgram); - else - glUseProgram(program); - - Cube(1.5); - - glPopMatrix(); - - CheckError(__LINE__); - - glutSwapBuffers(); -} - - -static void -Reshape(int width, int height) -{ - float ar = (float) width / (float) height; - glViewport(0, 0, width, height); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum(-ar, ar, -1.0, 1.0, 5.0, 25.0); - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glTranslatef(0.0f, 0.0f, -15.0f); -} - - -static void -CleanUp(void) -{ - glDeleteShader(fragShader); - glDeleteShader(fragTexShader); - glDeleteShader(vertShader); - glDeleteProgram(program); - glDeleteProgram(texProgram); - glutDestroyWindow(win); -} - - -static void -Key(unsigned char key, int x, int y) -{ - const GLfloat step = 2.0; - (void) x; - (void) y; - - switch(key) { - case 'a': - Anim = !Anim; - glutIdleFunc(Anim ? Idle : NULL); - break; - case 't': - Textured = !Textured; - break; - case 'z': - zRot += step; - break; - case 'Z': - zRot -= step; - break; - case 27: - CleanUp(); - exit(0); - break; - } - glutPostRedisplay(); -} - - -static void -SpecialKey(int key, int x, int y) -{ - const GLfloat step = 2.0; - - (void) x; - (void) y; - - switch(key) { - case GLUT_KEY_UP: - xRot += step; - break; - case GLUT_KEY_DOWN: - xRot -= step; - break; - case GLUT_KEY_LEFT: - yRot -= step; - break; - case GLUT_KEY_RIGHT: - yRot += step; - break; - } - glutPostRedisplay(); -} - - -static void -Init(void) -{ - if (!ShadersSupported()) - exit(1); - - vertShader = CompileShaderFile(GL_VERTEX_SHADER, VertProgFile); - fragShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragProgFile); - program = LinkShaders(vertShader, fragShader); - - glUseProgram(program); - - assert(glIsProgram(program)); - assert(glIsShader(fragShader)); - assert(glIsShader(vertShader)); - - assert(glGetError() == 0); - - CheckError(__LINE__); - - SetUniformValues(program, Uniforms); - PrintUniforms(Uniforms); - - CheckError(__LINE__); - - tangentAttrib = glGetAttribLocation(program, "Tangent"); - printf("Tangent Attrib: %d\n", tangentAttrib); - - assert(tangentAttrib >= 0); - - CheckError(__LINE__); - - - /* - * As above, but fragment shader also uses a texture map. - */ - fragTexShader = CompileShaderFile(GL_FRAGMENT_SHADER, FragTexProgFile); - texProgram = LinkShaders(vertShader, fragTexShader); - glUseProgram(texProgram); - assert(glIsProgram(texProgram)); - assert(glIsShader(fragTexShader)); - SetUniformValues(texProgram, TexUniforms); - PrintUniforms(TexUniforms); - - /* - * Load tex image. - */ - glGenTextures(1, &Texture); - glBindTexture(GL_TEXTURE_2D, Texture); - LoadRGBMipmaps(TextureFile, GL_RGB); - - - glClearColor(0.4f, 0.4f, 0.8f, 0.0f); - - glEnable(GL_DEPTH_TEST); - - glColor3f(1, 0, 0); -} - - -static void -ParseOptions(int argc, char *argv[]) -{ - int i; - for (i = 1; i < argc; i++) { - if (strcmp(argv[i], "-fs") == 0) { - FragProgFile = argv[++i]; - } - else if (strcmp(argv[i], "-vs") == 0) { - VertProgFile = argv[++i]; - } - else if (strcmp(argv[i], "-t") == 0) { - TextureFile = argv[++i]; - } - } -} - - -int -main(int argc, char *argv[]) -{ - glutInit(&argc, argv); - glutInitWindowSize(400, 400); - glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH); - win = glutCreateWindow(argv[0]); - glewInit(); - glutReshapeFunc(Reshape); - glutKeyboardFunc(Key); - glutSpecialFunc(SpecialKey); - glutDisplayFunc(Redisplay); - ParseOptions(argc, argv); - Init(); - glutMainLoop(); - return 0; -} - |