mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
synced 2025-12-24 19:40:10 +01:00
simple noise test
This commit is contained in:
Brian
parent
a06f929362
commit
f94e4f216f
2 changed files with 297 additions and 0 deletions
|
|
@ -17,6 +17,7 @@ PROGS = \
|
|||
brick \
|
||||
bump \
|
||||
mandelbrot \
|
||||
noise \
|
||||
toyball
|
||||
|
||||
|
||||
|
|
|
|||
296
progs/glsl/noise.c
Normal file
296
progs/glsl/noise.c
Normal file
|
|
@ -0,0 +1,296 @@
|
|||
/**
|
||||
* Test noise() functions.
|
||||
* 28 Jan 2007
|
||||
*/
|
||||
|
||||
#include <assert.h>
|
||||
#include <string.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <math.h>
|
||||
#include <GL/gl.h>
|
||||
#include <GL/glut.h>
|
||||
#include <GL/glext.h>
|
||||
#include "extfuncs.h"
|
||||
|
||||
|
||||
static const char *VertShaderText =
|
||||
"void main() {\n"
|
||||
" gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;\n"
|
||||
"}\n";
|
||||
|
||||
static const char *FragShaderText =
|
||||
"uniform vec4 Scale, Bias;\n"
|
||||
"uniform float Slice;\n"
|
||||
"void main()\n"
|
||||
"{\n"
|
||||
" vec4 scale = vec4(5.0);\n"
|
||||
" vec4 p;\n"
|
||||
" p.xy = gl_TexCoord[0].xy;\n"
|
||||
" p.z = Slice;\n"
|
||||
" vec4 n = noise4(p * scale);\n"
|
||||
" gl_FragColor = n * Scale + Bias;\n"
|
||||
"}\n";
|
||||
|
||||
|
||||
struct uniform_info {
|
||||
const char *name;
|
||||
GLuint size;
|
||||
GLint location;
|
||||
GLfloat value[4];
|
||||
};
|
||||
|
||||
static struct uniform_info Uniforms[] = {
|
||||
{ "Scale", 4, -1, { 0.5, 0.4, 0.0, 0} },
|
||||
{ "Bias", 4, -1, { 0.5, 0.3, 0.0, 0} },
|
||||
{ "Slice", 1, -1, { 0.5, 0, 0, 0} },
|
||||
{ NULL, 0, 0, { 0, 0, 0, 0 } }
|
||||
};
|
||||
|
||||
/* program/shader objects */
|
||||
static GLuint fragShader;
|
||||
static GLuint vertShader;
|
||||
static GLuint program;
|
||||
|
||||
static GLint win = 0;
|
||||
static GLfloat xRot = 0.0f, yRot = 0.0f, zRot = 0.0f;
|
||||
static GLfloat Slice = 0.0;
|
||||
static GLboolean Anim = GL_FALSE;
|
||||
|
||||
|
||||
static void
|
||||
Idle(void)
|
||||
{
|
||||
Slice += 0.01;
|
||||
glutPostRedisplay();
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
Redisplay(void)
|
||||
{
|
||||
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
|
||||
|
||||
glUniform1fv_func(Uniforms[2].location, 1, &Slice);
|
||||
|
||||
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);
|
||||
|
||||
glBegin(GL_POLYGON);
|
||||
glTexCoord2f(0, 0); glVertex2f(-2, -2);
|
||||
glTexCoord2f(1, 0); glVertex2f( 2, -2);
|
||||
glTexCoord2f(1, 1); glVertex2f( 2, 2);
|
||||
glTexCoord2f(0, 1); glVertex2f(-2, 2);
|
||||
glEnd();
|
||||
|
||||
glPopMatrix();
|
||||
|
||||
glutSwapBuffers();
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
Reshape(int width, int height)
|
||||
{
|
||||
glViewport(0, 0, width, height);
|
||||
glMatrixMode(GL_PROJECTION);
|
||||
glLoadIdentity();
|
||||
glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0);
|
||||
glMatrixMode(GL_MODELVIEW);
|
||||
glLoadIdentity();
|
||||
glTranslatef(0.0f, 0.0f, -15.0f);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
CleanUp(void)
|
||||
{
|
||||
glDeleteShader_func(fragShader);
|
||||
glDeleteShader_func(vertShader);
|
||||
glDeleteProgram_func(program);
|
||||
glutDestroyWindow(win);
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
Key(unsigned char key, int x, int y)
|
||||
{
|
||||
const GLfloat step = 0.01;
|
||||
(void) x;
|
||||
(void) y;
|
||||
|
||||
switch(key) {
|
||||
case 'a':
|
||||
Anim = !Anim;
|
||||
glutIdleFunc(Anim ? Idle : NULL);
|
||||
case 's':
|
||||
Slice -= step;
|
||||
break;
|
||||
case 'S':
|
||||
Slice += step;
|
||||
break;
|
||||
case 'z':
|
||||
zRot -= 1.0;
|
||||
break;
|
||||
case 'Z':
|
||||
zRot += 1.0;
|
||||
break;
|
||||
case 27:
|
||||
CleanUp();
|
||||
exit(0);
|
||||
break;
|
||||
}
|
||||
glutPostRedisplay();
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
SpecialKey(int key, int x, int y)
|
||||
{
|
||||
const GLfloat step = 3.0f;
|
||||
|
||||
(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
|
||||
LoadAndCompileShader(GLuint shader, const char *text)
|
||||
{
|
||||
GLint stat;
|
||||
|
||||
glShaderSource_func(shader, 1, (const GLchar **) &text, NULL);
|
||||
|
||||
glCompileShader_func(shader);
|
||||
|
||||
glGetShaderiv_func(shader, GL_COMPILE_STATUS, &stat);
|
||||
if (!stat) {
|
||||
GLchar log[1000];
|
||||
GLsizei len;
|
||||
glGetShaderInfoLog_func(shader, 1000, &len, log);
|
||||
fprintf(stderr, "brick: problem compiling shader: %s\n", log);
|
||||
exit(1);
|
||||
}
|
||||
else {
|
||||
printf("Shader compiled OK\n");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
CheckLink(GLuint prog)
|
||||
{
|
||||
GLint stat;
|
||||
glGetProgramiv_func(prog, GL_LINK_STATUS, &stat);
|
||||
if (!stat) {
|
||||
GLchar log[1000];
|
||||
GLsizei len;
|
||||
glGetProgramInfoLog_func(prog, 1000, &len, log);
|
||||
fprintf(stderr, "Linker error:\n%s\n", log);
|
||||
}
|
||||
else {
|
||||
fprintf(stderr, "Link success!\n");
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static void
|
||||
Init(void)
|
||||
{
|
||||
const char *version;
|
||||
GLint i;
|
||||
|
||||
version = (const char *) glGetString(GL_VERSION);
|
||||
if (version[0] != '2' || version[1] != '.') {
|
||||
printf("Warning: this program expects OpenGL 2.0\n");
|
||||
/*exit(1);*/
|
||||
}
|
||||
|
||||
GetExtensionFuncs();
|
||||
|
||||
vertShader = glCreateShader_func(GL_VERTEX_SHADER);
|
||||
LoadAndCompileShader(vertShader, VertShaderText);
|
||||
|
||||
fragShader = glCreateShader_func(GL_FRAGMENT_SHADER);
|
||||
LoadAndCompileShader(fragShader, FragShaderText);
|
||||
|
||||
program = glCreateProgram_func();
|
||||
glAttachShader_func(program, fragShader);
|
||||
glAttachShader_func(program, vertShader);
|
||||
glLinkProgram_func(program);
|
||||
CheckLink(program);
|
||||
glUseProgram_func(program);
|
||||
|
||||
for (i = 0; Uniforms[i].name; i++) {
|
||||
Uniforms[i].location
|
||||
= glGetUniformLocation_func(program, Uniforms[i].name);
|
||||
printf("Uniform %s location: %d\n", Uniforms[i].name,
|
||||
Uniforms[i].location);
|
||||
switch (Uniforms[i].size) {
|
||||
case 1:
|
||||
glUniform1fv_func(Uniforms[i].location, 1, Uniforms[i].value);
|
||||
break;
|
||||
case 2:
|
||||
glUniform2fv_func(Uniforms[i].location, 1, Uniforms[i].value);
|
||||
break;
|
||||
case 3:
|
||||
glUniform3fv_func(Uniforms[i].location, 1, Uniforms[i].value);
|
||||
break;
|
||||
case 4:
|
||||
glUniform4fv_func(Uniforms[i].location, 1, Uniforms[i].value);
|
||||
break;
|
||||
default:
|
||||
abort();
|
||||
}
|
||||
}
|
||||
|
||||
assert(glGetError() == 0);
|
||||
|
||||
glClearColor(0.4f, 0.4f, 0.8f, 0.0f);
|
||||
|
||||
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
|
||||
|
||||
assert(glIsProgram_func(program));
|
||||
assert(glIsShader_func(fragShader));
|
||||
assert(glIsShader_func(vertShader));
|
||||
|
||||
glColor3f(1, 0, 0);
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
main(int argc, char *argv[])
|
||||
{
|
||||
glutInit(&argc, argv);
|
||||
glutInitWindowPosition( 0, 0);
|
||||
glutInitWindowSize(400, 400);
|
||||
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
|
||||
win = glutCreateWindow(argv[0]);
|
||||
glutReshapeFunc(Reshape);
|
||||
glutKeyboardFunc(Key);
|
||||
glutSpecialFunc(SpecialKey);
|
||||
glutDisplayFunc(Redisplay);
|
||||
Init();
|
||||
glutMainLoop();
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Add table
Reference in a new issue