summaryrefslogtreecommitdiff
path: root/progs/glsl/bump.c
diff options
context:
space:
mode:
Diffstat (limited to 'progs/glsl/bump.c')
-rw-r--r--progs/glsl/bump.c347
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;
-}
-
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-30 03:22:00 +0000