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add texturing, other options

This commit is contained in:
Brian 2007-01-17 10:25:44 -07:00
parent 811f54fa75
commit 46a9241248
1 changed files with 152 additions and 6 deletions
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158
progs/demos/fslight.c
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@ -22,6 +22,9 @@
#include <GL/glext.h>
#include "extfuncs.h"
static GLint CoordAttrib = 0;
static char *FragProgFile = NULL;
static char *VertProgFile = NULL;
@ -37,7 +40,9 @@ static GLuint program;
static GLint uLightPos;
static GLint uDiffuse;
static GLint uSpecular;
static GLint uTexture;
static GLuint SphereList, RectList, CurList;
static GLint win = 0;
static GLboolean anim = GL_FALSE;
static GLboolean wire = GL_FALSE;
@ -46,7 +51,7 @@ static GLboolean pixelLight = GL_TRUE;
static GLint t0 = 0;
static GLint frames = 0;
static GLfloat xRot = 0.0f, yRot = 0.0f;
static GLfloat xRot = 90.0f, yRot = 0.0f;
static void
@ -80,7 +85,10 @@ Redisplay(void)
glPushMatrix();
glRotatef(xRot, 1.0f, 0.0f, 0.0f);
glRotatef(yRot, 0.0f, 1.0f, 0.0f);
/*
glutSolidSphere(2.0, 10, 5);
*/
glCallList(CurList);
glPopMatrix();
glutSwapBuffers();
@ -161,6 +169,12 @@ Key(unsigned char key, int x, int y)
else
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
break;
case 'o':
if (CurList == SphereList)
CurList = RectList;
else
CurList = SphereList;
break;
case 'p':
pixelLight = !pixelLight;
if (pixelLight)
@ -267,6 +281,113 @@ TestFunctions(void)
}
static void
MakeTexture(void)
{
#define SZ0 128
#define SZ1 64
GLubyte image0[SZ0][SZ0][SZ0][4];
GLubyte image1[SZ1][SZ1][SZ1][4];
GLuint i, j, k;
/* level 0: two-tone gray checkboard */
for (i = 0; i < SZ0; i++) {
for (j = 0; j < SZ0; j++) {
for (k = 0; k < SZ0; k++) {
if ((i/8 + j/8 + k/8) & 1) {
image0[i][j][k][0] =
image0[i][j][k][1] =
image0[i][j][k][2] = 200;
}
else {
image0[i][j][k][0] =
image0[i][j][k][1] =
image0[i][j][k][2] = 100;
}
image0[i][j][k][3] = 255;
}
}
}
/* level 1: two-tone green checkboard */
for (i = 0; i < SZ1; i++) {
for (j = 0; j < SZ1; j++) {
for (k = 0; k < SZ1; k++) {
if ((i/8 + j/8 + k/8) & 1) {
image1[i][j][k][0] = 0;
image1[i][j][k][1] = 250;
image1[i][j][k][2] = 0;
}
else {
image1[i][j][k][0] = 0;
image1[i][j][k][1] = 200;
image1[i][j][k][2] = 0;
}
image1[i][j][k][3] = 255;
}
}
}
glActiveTexture(GL_TEXTURE2); /* unit 2 */
glBindTexture(GL_TEXTURE_2D, 42);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, SZ0, SZ0, 0,
GL_RGBA, GL_UNSIGNED_BYTE, image0);
glTexImage2D(GL_TEXTURE_2D, 1, GL_RGBA, SZ1, SZ1, 0,
GL_RGBA, GL_UNSIGNED_BYTE, image1);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glActiveTexture(GL_TEXTURE4); /* unit 4 */
glBindTexture(GL_TEXTURE_3D, 43);
glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, SZ0, SZ0, SZ0, 0,
GL_RGBA, GL_UNSIGNED_BYTE, image0);
glTexImage3D(GL_TEXTURE_3D, 1, GL_RGBA, SZ1, SZ1, SZ1, 0,
GL_RGBA, GL_UNSIGNED_BYTE, image1);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAX_LEVEL, 1);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
static void
MakeSphere(void)
{
GLUquadricObj *obj = gluNewQuadric();
SphereList = glGenLists(1);
gluQuadricTexture(obj, GL_TRUE);
glNewList(SphereList, GL_COMPILE);
gluSphere(obj, 2.0f, 10, 5);
glEndList();
}
static void
VertAttrib(GLint index, float x, float y)
{
#if 1
glVertexAttrib2f_func(index, x, y);
#else
glTexCoord2f(x, y);
#endif
}
static void
MakeRect(void)
{
RectList = glGenLists(1);
glNewList(RectList, GL_COMPILE);
glNormal3f(0, 0, 1);
glBegin(GL_POLYGON);
VertAttrib(CoordAttrib, 0, 0); glVertex2f(-2, -2);
VertAttrib(CoordAttrib, 1, 0); glVertex2f( 2, -2);
VertAttrib(CoordAttrib, 1, 1); glVertex2f( 2, 2);
VertAttrib(CoordAttrib, 0, 1); glVertex2f(-2, 2);
glEnd(); /* XXX omit this and crash! */
glEndList();
}
static void
LoadAndCompileShader(GLuint shader, const char *text)
{
@ -281,7 +402,7 @@ LoadAndCompileShader(GLuint shader, const char *text)
GLchar log[1000];
GLsizei len;
glGetShaderInfoLog_func(shader, 1000, &len, log);
fprintf(stderr, "Problem compiling shader: %s\n", log);
fprintf(stderr, "fslight: problem compiling shader: %s\n", log);
exit(1);
}
}
@ -298,12 +419,12 @@ ReadShader(GLuint shader, const char *filename)
char *buffer = (char*) malloc(max);
FILE *f = fopen(filename, "r");
if (!f) {
fprintf(stderr, "Unable to open shader file %s\n", filename);
fprintf(stderr, "fslight: Unable to open shader file %s\n", filename);
exit(1);
}
n = fread(buffer, 1, max, f);
printf("Read %d bytes from shader file %s\n", n, filename);
printf("fslight: read %d bytes from shader file %s\n", n, filename);
if (n > 0) {
buffer[n] = 0;
LoadAndCompileShader(shader, buffer);
@ -381,11 +502,29 @@ Init(void)
uLightPos = glGetUniformLocation_func(program, "lightPos");
uDiffuse = glGetUniformLocation_func(program, "diffuse");
uSpecular = glGetUniformLocation_func(program, "specular");
printf("LightPos %d DiffusePos %d SpecularPos %d\n",
uLightPos, uDiffuse, uSpecular);
uTexture = glGetUniformLocation_func(program, "texture");
printf("LightPos %d DiffusePos %d SpecularPos %d TexturePos %d\n",
uLightPos, uDiffuse, uSpecular, uTexture);
glUniform4fv_func(uDiffuse, 1, diffuse);
glUniform4fv_func(uSpecular, 1, specular);
glUniform1i_func(uTexture, 2); /* use texture unit 2 */
if (CoordAttrib) {
int i;
glBindAttribLocation_func(program, CoordAttrib, "coord");
i = glGetAttribLocation_func(program, "coord");
assert(i >= 0);
if (i != CoordAttrib) {
printf("Hmmm, NVIDIA bug?\n");
CoordAttrib = i;
}
else {
printf("Mesa bind attrib: coord = %d\n", i);
}
}
/*assert(glGetError() == 0);*/
glClearColor(0.3f, 0.3f, 0.3f, 0.0f);
glEnable(GL_DEPTH_TEST);
@ -395,6 +534,13 @@ Init(void)
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, specular);
glMaterialf(GL_FRONT_AND_BACK, GL_SHININESS, 20.0f);
MakeSphere();
MakeRect();
CurList = SphereList;
MakeTexture();
printf("GL_RENDERER = %s\n",(const char *) glGetString(GL_RENDERER));
printf("Press p to toggle between per-pixel and per-vertex lighting\n");