Mirrors/overte
3
0
Fork 0
mirror of https://github.com/overte-org/overte.git synced 2025-04-08 16:55:06 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions 2

Uses point sprites, Grayson's texture, and 100,000 particles

Browse source
This commit is contained in:
Yoz Grahame 2012-11-06 17:59:20 -08:00
parent 65bba76f5f
commit e6ef767152
3 changed files with 67 additions and 31 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

BIN
images/grayson-particle.png Normal file
View file

Binary file not shown.
Side by side

After

Width:  |  Height:  |  Size: 37 KiB

4
interface.xcodeproj/project.pbxproj
View file

@ -28,6 +28,7 @@
F681356E16488470003040E3 /* philip-image.png in CopyFiles */ = {isa = PBXBuildFile; fileRef = F681356D1648846A003040E3 /* philip-image.png */; };
F681358B1648896D003040E3 /* lodepng.cpp in Sources */ = {isa = PBXBuildFile; fileRef = F681358A1648896D003040E3 /* lodepng.cpp */; };
F68135971649CF41003040E3 /* sphere.png in CopyFiles */ = {isa = PBXBuildFile; fileRef = F68135951649CF38003040E3 /* sphere.png */; };
F68135B21649EF3F003040E3 /* grayson-particle.png in CopyFiles */ = {isa = PBXBuildFile; fileRef = F68135B01649EF37003040E3 /* grayson-particle.png */; };
/* End PBXBuildFile section */
/* Begin PBXCopyFilesBuildPhase section */
@ -37,6 +38,7 @@
dstPath = "";
dstSubfolderSpec = 16;
files = (
F68135B21649EF3F003040E3 /* grayson-particle.png in CopyFiles */,
F68135971649CF41003040E3 /* sphere.png in CopyFiles */,
F681356E16488470003040E3 /* philip-image.png in CopyFiles */,
F68135691648830D003040E3 /* pngtest8rgba.png in CopyFiles */,
@ -80,6 +82,7 @@
F681358A1648896D003040E3 /* lodepng.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = lodepng.cpp; sourceTree = "<group>"; };
F681358C16488978003040E3 /* lodepng.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = lodepng.h; sourceTree = "<group>"; };
F68135951649CF38003040E3 /* sphere.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = sphere.png; sourceTree = "<group>"; };
F68135B01649EF37003040E3 /* grayson-particle.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "grayson-particle.png"; sourceTree = "<group>"; };
/* End PBXFileReference section */
/* Begin PBXFrameworksBuildPhase section */
@ -174,6 +177,7 @@
F681356716487A7F003040E3 /* images */ = {
isa = PBXGroup;
children = (
F68135B01649EF37003040E3 /* grayson-particle.png */,
F68135951649CF38003040E3 /* sphere.png */,
F681356D1648846A003040E3 /* philip-image.png */,
F681356816487A7F003040E3 /* pngtest8rgba.png */,

94
main.cpp
View file

@ -16,6 +16,8 @@
#ifdef __APPLE__
#include <GLUT/glut.h>
#include <OpenGL/gl.h>
#include <OpenGL/glext.h>
#else
#include <GL/glut.h>
#endif
@ -114,9 +116,9 @@ ParticleSystem balls(500,
#define RENDER_FRAME_MSECS 10
#define SLEEP 0
#define NUM_TRIS 100 // 20000 //000
#define NUM_TRIS 1000 * 500 // 20000 //000
struct {
float vertices[NUM_TRIS * 9];
float vertices[NUM_TRIS * 3];
float normals [NUM_TRIS * 3];
float colors [NUM_TRIS * 3];
float vel [NUM_TRIS * 3];
@ -192,6 +194,20 @@ timeval timer_start, timer_end;
timeval last_frame;
double elapsedTime;
// Particles
// To add a new texture:
// 1. Add to the XCode project in the Resources/images group
// (ensure "Copy file" is checked
// 2. Add to the "Copy files" build phase in the project
char texture_filename[] = "grayson-particle.png";
unsigned int texture_width = 256;
unsigned int texture_height = 256;
float particle_attenuation_quadratic[] = { 0.0f, 0.0f, 2.0f }; // larger Z = smaller particles
// Every second, check the frame rates and other stuff
void Timer(int extra)
{
@ -285,14 +301,12 @@ void init(void)
randFloat() * WORLD_SIZE,
randFloat() * WORLD_SIZE);
glm::vec3 verts[3];
for (j = 0; j < 3; j++) {
verts[j].x = pos.x + randFloat() * tri_scale - tri_scale/2.f;
verts[j].y = pos.y + randFloat() * tri_scale - tri_scale/2.f;
verts[j].z = pos.z + randFloat() * tri_scale - tri_scale/2.f;
tris.vertices[i*9 + j*3] = verts[j].x;
tris.vertices[i*9 + j*3 + 1] = verts[j].y;
tris.vertices[i*9 + j*3 + 2] = verts[j].z;
}
verts[j].x = pos.x + randFloat() * tri_scale - tri_scale/2.f;
verts[j].y = pos.y + randFloat() * tri_scale - tri_scale/2.f;
verts[j].z = pos.z + randFloat() * tri_scale - tri_scale/2.f;
tris.vertices[i*3] = verts[j].x;
tris.vertices[i*3 + 1] = verts[j].y;
tris.vertices[i*3 + 2] = verts[j].z;
// reuse pos for the normal
glm::normalize((pos += glm::cross(verts[1] - verts[0], verts[2] - verts[0])));
tris.normals[i*3] = pos.x;
@ -561,7 +575,7 @@ void update_pos(float frametime)
void display(void)
{
int i,j;
int i;
glEnable (GL_DEPTH_TEST);
glEnable(GL_LIGHTING);
@ -606,10 +620,6 @@ void display(void)
but texture origin is at upper left
=> it has to be mirrored */
char texture_filename[] = "sphere.png";
unsigned int texture_width = 91;
unsigned int texture_height = 69;
int error = load_png_as_texture(texture_filename, texture_width, texture_height);
glEnable(GL_TEXTURE_2D);
glBegin(GL_QUADS);
@ -622,26 +632,48 @@ void display(void)
glDisable(GL_TEXTURE_2D);
// Draw Triangles
// Draw Point Sprites
glBegin(GL_TRIANGLES);
for (i = 0; i < NUM_TRIS; i++)
/* assuming you have setup a 32-bit RGBA texture with a legal name */
glActiveTexture(GL_TEXTURE0);
glEnable( GL_TEXTURE_2D );
glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glPointParameterfvARB( GL_POINT_DISTANCE_ATTENUATION_ARB, particle_attenuation_quadratic );
float maxSize = 0.0f;
glGetFloatv( GL_POINT_SIZE_MAX_ARB, &maxSize );
glPointSize( maxSize );
glPointParameterfARB( GL_POINT_SIZE_MAX_ARB, maxSize );
// glPointParameterfARB( GL_POINT_SIZE_MIN_ARB, 0.001f );
glTexEnvf( GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE );
glEnable( GL_POINT_SPRITE_ARB );
glBegin( GL_POINTS );
{
glColor3f(tris.colors[i*3],
tris.colors[i*3+1],
tris.colors[i*3+2]);
for (j = 0; j < 3; j++)
for (i = 0; i < NUM_TRIS; i++)
{
glVertex3f(tris.vertices[i*9 + j*3],
tris.vertices[i*9 + j*3 + 1],
tris.vertices[i*9 + j*3 + 2]);
// glColor3f(tris.colors[i*3],
// tris.colors[i*3+1],
// tris.colors[i*3+2]);
// for (j = 0; j < 3; j++)
// {
// glVertex3f(tris.vertices[i*9 + j*3],
// tris.vertices[i*9 + j*3 + 1],
// tris.vertices[i*9 + j*3 + 2]);
// }
// glNormal3f(tris.normals[i*3],
// tris.normals[i*3 + 1],
// tris.normals[i*3 + 2]);
glVertex3f(tris.vertices[i*9],
tris.vertices[i*9+1],
tris.vertices[i*9+2]);
}
glNormal3f(tris.normals[i*3],
tris.normals[i*3 + 1],
tris.normals[i*3 + 2]);
}
glEnd();
glDisable( GL_TEXTURE_2D );
glDisable( GL_POINT_SPRITE_ARB );
// Show field vectors
if (display_field) field_render();
@ -654,7 +686,7 @@ void display(void)
}
myHand.render();
balls.render();
// balls.render();
// Render the world box
render_world_box();
@ -816,7 +848,7 @@ void idle(void)
field_simulate(1.f/FPS);
myHead.simulate(1.f/FPS);
myHand.simulate(1.f/FPS);
balls.simulate(1.f/FPS);
// balls.simulate(1.f/FPS);
if (!step_on) glutPostRedisplay();
last_frame = check;