Messages

1

Graphics / How to set texture for vertices array

« on: March 15, 2012, 11:39:50 pm »

Ok. i manage somehow to make solution for vs2010 and compiled debug & release libs of SMFL. Now to replace all function names to lowercase   :cry:

2

Graphics / How to set texture for vertices array

« on: March 15, 2012, 11:11:18 pm »

For example, to generate a Visual Studio 10 solution, you must choose "Visual Studio 10". To generate makefiles usable with Visual C++, select "NMake makefiles".

What is a difference beetwen vs2010 and Visual c++ in this context?
Now i don't know what to choose?
What is NMake makefiles JOM?

3

Graphics / How to set texture for vertices array

« on: March 15, 2012, 10:54:01 pm »

Why don't you release prebuilt binaries?
Why do everybody likes this stupid CMake? Its junk generator!

Oh god why are you tortuering me??? O why did you make my life harder?

I dont understand this from tutorial (I am using VS2010):

With Visual C++, you can either run CMake from the "Visual Studio command prompt" available from the start menu, or call the vcvars32.bat file of your Visual Studio installation; it will setup the environment variables properly.

> your_visual_studio_folder\VC\bin\vcvars32.bat
> cmake

Do i need both of these programs? Whats with this combination?

What to choose here for VS2010 c++

a vs 2010 or NMake makefiles?

4

Graphics / How to set texture for vertices array

« on: March 15, 2012, 08:58:39 pm »

Ok. Here is a test src:

Code: [Select]


#include <iostream>
#include <SFML/Graphics.hpp>

#pragma comment(lib, "sfml-graphics-d.lib")
#pragma comment(lib, "sfml-window-d.lib")
#pragma comment(lib, "sfml-system-d.lib")

int main()
{
try
{
sf::RenderWindow wnd(sf::VideoMode( 200, 200, 32 ), "Test vertices");

sf::Texture tex;
if(!tex.LoadFromFile("smoke.tga"))
{
throw std::runtime_error("Failed to load texture!");
}

float tw = (float)tex.GetWidth();
float th = (float)tex.GetHeight();

sf::Transform transform;
transform.Translate(100.0f, 100.0f);
sf::RenderStates rs;
rs.Transform = transform;
rs.Texture   = &tex;
rs.BlendMode = sf::BlendNone;

float size = 50.0f;
sf::Vertex vertices[6];
vertices[0].Color        = sf::Color(255,255,255,255);
vertices[0].Position.x   = size;
vertices[0].Position.y   = size;
vertices[0].TexCoords    = sf::Vector2f(tw, th);

vertices[1].Color        = sf::Color(255,255,255,255);
vertices[1].Position.x   = size;
vertices[1].Position.y   = -size;
vertices[1].TexCoords    = sf::Vector2f(tw, 0.0f);

vertices[2].Color        = sf::Color(255,255,255,255);
vertices[2].Position.x   = -size;
vertices[2].Position.y   = -size;
vertices[2].TexCoords    = sf::Vector2f(0.0f, 0.0f);

vertices[3].Color        = sf::Color(255,255,255,255);
vertices[3].Position.x   = size;
vertices[3].Position.y   = size;
vertices[3].TexCoords    = sf::Vector2f(tw, th);

vertices[4].Color        = sf::Color(255,255,255,255);
vertices[4].Position.x   = -size;
vertices[4].Position.y   = -size;
vertices[4].TexCoords    = sf::Vector2f(0.0f, 0.0f);

vertices[5].Color        = sf::Color(255,255,255,255);
vertices[5].Position.x   = -size;
vertices[5].Position.y   = size;
vertices[5].TexCoords    = sf::Vector2f(0.0f, th);


while(wnd.IsOpen())
{
sf::Event event;
while( wnd.PollEvent(event) )
{
switch(event.Type)
{
case sf::Event::Closed:
{
wnd.Close();
return false;
}break;
};
}
wnd.Clear(sf::Color(0, 0, 0));

wnd.Draw( vertices, 6, sf::Triangles, rs);

wnd.Display();
}
}
catch( const std::runtime_error& e)
{
std::cout << e.what() << std::endl;
std::cin.ignore();
return EXIT_FAILURE;
}
std::cin.ignore();
return EXIT_SUCCESS;
}


render screenshot:


tga image in Photoshop (saved as 32bits uncompressed). i have recolored "borders" to be blue for easier explaination:


Image uploaded to sendspace:
http://www.sendspace.com/file/zqgnlg

I expected render (with BlendNone) to show blue "borders" aroun green circle.

I expected this with BlendNone (edit in Photoshop):

5

Graphics / How to set texture for vertices array

« on: March 15, 2012, 07:07:55 pm »

Thats it hanks.

But its strange that i have specified BlendNone yet it shows no white "borders" aroung green circle? Whats wrong?

6

Graphics / How to set texture for vertices array

« on: March 15, 2012, 06:32:09 pm »

Hmmm. I can't get this right. if image has alpha channel nothing is displayed, and if it does not then it only shows vertex color:

Code: [Select]


int main() {
...
sf::Texture tex;
if(!tex.LoadFromFile("smoke.tga"))
{
return 1;
}

sf::RenderStates rs;
rs.Texture = &tex;
rs.BlendMode = sf::BlendNone;

float size = 50.0f;
sf::Vector2f pos(400.0f, 300.0f);
sf::Vertex vertices[6];
vertices[0].Color        = sf::Color(255,255,255,255);
vertices[0].Position.x   = pos.x + size;
vertices[0].Position.y   = pos.y + size;
vertices[0].TexCoords    = sf::Vector2f(1.0f, 1.0f);

vertices[1].Color        = sf::Color(255,255,255,255);
vertices[1].Position.x   = pos.x + size;
vertices[1].Position.y   = pos.y - size;
vertices[1].TexCoords    = sf::Vector2f(1.0f, 0.0f);

vertices[2].Color        = sf::Color(255,255,255,255);
vertices[2].Position.x   = pos.x - size;
vertices[2].Position.y   = pos.y - size;
vertices[2].TexCoords    = sf::Vector2f(0.0f, 0.0f);

vertices[3].Color        = sf::Color(255,255,255,255);
vertices[3].Position.x   = pos.x + size;
vertices[3].Position.y   = pos.y + size;
vertices[3].TexCoords    = sf::Vector2f(1.0f, 1.0f);

vertices[4].Color        = sf::Color(255,255,255,255);
vertices[4].Position.x   = pos.x - size;
vertices[4].Position.y   = pos.y - size;
vertices[4].TexCoords    = sf::Vector2f(0.0f, 0.0f);

vertices[5].Color        = sf::Color(255,255,255,255);
vertices[5].Position.x   = pos.x - size;
vertices[5].Position.y   = pos.y + size;
vertices[5].TexCoords    = sf::Vector2f(0.0f, 1.0f);
...
wnd.Draw( vertices, 6, sf::Triangles, rs);


here is a image "smoke.tga"(32bits, uncompressed tga):
http://fs10u.sendspace.com/processupload.html

Is just a green circle with

7

Graphics / How to set texture for vertices array

« on: March 15, 2012, 12:44:22 pm »

Thanks.

8

Graphics / How to set texture for vertices array

« on: March 15, 2012, 12:32:44 pm »

I tried to search but could not find what i need.
How to set texture for vertices array:

Code: [Select]


sf::Vertex* vert = new sf::Vertex[6];
...//fill vertices
...
??? SetTexture(???) ; // WHAT?
window.Draw( vert, 6, sf::Triangles);


Thanks for your time.

9

General discussions / SFML Box2D another example

« on: March 05, 2012, 12:45:40 am »

Hi, sorry for intrusion on this topic.
I have some problem with Box2D and SMFL, especialy circle shapes, i made a minimalistic code that shows problem:
VS2010
Box2D 2.21
SMFL 2.0

Code: [Select]


#include <iostream>

// SMFL
#include <SFML/Graphics.hpp>
#pragma comment(lib, "sfml-graphics-d.lib")
#pragma comment(lib, "sfml-window-d.lib")
#pragma comment(lib, "sfml-system-d.lib")

// Box2D
#include <Box2D/Box2D.h>
#pragma comment(lib, "Box2D.lib")

#define B2_PIXEL_RATIO 30.0f

int main()
{
sf::RenderWindow window(sf::VideoMode(800, 600), "SFML window");
sf::Vector2f winSize = window.GetDefaultView().GetSize();

sf::Vector2f shapePosition(winSize.x * 0.5f, winSize.y * 0.5f);

// Rect body
float radius = 20.0f;
sf::CircleShape  rcShape(radius);
rcShape.SetPosition(shapePosition);
rcShape.SetFillColor(sf::Color(255,255,0,255));

b2World  phWorld(b2Vec2(0, 0));

b2BodyDef shapeBodyDef;
shapeBodyDef.type     = b2_dynamicBody;
shapeBodyDef.position = b2Vec2(shapePosition.x / B2_PIXEL_RATIO, shapePosition.y / B2_PIXEL_RATIO);
b2Body* shapeBody     = phWorld.CreateBody(&shapeBodyDef);

b2CircleShape circleShape;
circleShape.m_radius = radius / B2_PIXEL_RATIO;

b2FixtureDef rcShapeFixDef;
rcShapeFixDef.shape       = &circleShape;
rcShapeFixDef.density     = 10.0f;
rcShapeFixDef.friction    = 0.4f;
rcShapeFixDef.restitution = 1.0f;
shapeBody->CreateFixture(&rcShapeFixDef);

// Surround screen with static edges
b2FixtureDef groundBoxDef;
b2BodyDef groundBodyDef;
groundBodyDef.position.Set(0,0);
b2Body* groundBody = phWorld.CreateBody(&groundBodyDef);

b2Vec2 vs[5];
vs[0].Set(winSize.x / B2_PIXEL_RATIO, 0.0f);
vs[1].Set(winSize.x / B2_PIXEL_RATIO, winSize.y / B2_PIXEL_RATIO);
vs[2].Set(0.0f, winSize.y / B2_PIXEL_RATIO);
vs[3].Set(0.0f, 0.0f);
vs[4].Set(winSize.x / B2_PIXEL_RATIO, 0.0f);
b2ChainShape wallShape;
wallShape.CreateChain(vs, 5);
groundBoxDef.shape = &wallShape;
groundBody->CreateFixture(&groundBoxDef);

float scale = 5.0f;
shapeBody->SetLinearVelocity(b2Vec2(scale, scale));

while(window.IsOpen())
{
sf::Event event;
while (window.PollEvent(event))
{
if (event.Type == sf::Event::Closed)
window.Close();
}

float timeStep = 1.0f / 6000.0f;
phWorld.Step(timeStep, 10, 10);

float x = shapeBody->GetPosition().x * B2_PIXEL_RATIO;
float y = shapeBody->GetPosition().y * B2_PIXEL_RATIO;
rcShape.SetPosition(x, y);

window.Clear();
window.Draw(rcShape);
window.Display();
}
return EXIT_SUCCESS;
}



When i run this circle has some offset and penetrates bottom & right part of the screen and also for left & top can't reach all the way.
Sorry for my english, can't explain any better, and i am really frustrated as i can't find out whats wrong.
If you find time, please help.

10

Graphics / SetOrigin on shapes

« on: March 04, 2012, 09:18:33 pm »

I guess it is top-left as you said. I thought it would be same as center of mass (witch is by default centre of shape).  :oops:
Even better, no need for SetOrigin then.

11

Graphics / SetOrigin on shapes

« on: March 04, 2012, 07:18:55 pm »

For some reason i get some offset when drawing shapes:

yellow is the shape, red are debug draw.


I made smallest example for you to try:
VS2010
Box2D 2.2.1
SMFL 2.0

Code: [Select]


#include <iostream>

// SMFL
#include <SFML/Graphics.hpp>
#pragma comment(lib, "sfml-graphics-d.lib")
#pragma comment(lib, "sfml-window-d.lib")
#pragma comment(lib, "sfml-system-d.lib")

// Box2D
#include <Box2D/Box2D.h>
#pragma comment(lib, "Box2D.lib")

#define B2_PIXEL_RATIO 30.0f

class MyDebugDraw : public b2Draw
{
private:
sf::RenderWindow* wnd;
public:
MyDebugDraw(sf::RenderWindow* w) : wnd(w) {}
void DrawPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color)
{}
void DrawSolidPolygon(const b2Vec2* vertices, int32 vertexCount, const b2Color& color)
{
sf::Vertex* vert = new sf::Vertex[vertexCount];
for(int32 i = 0; i < vertexCount; ++i)
{
vert[i].Position.x = vertices[i].x * B2_PIXEL_RATIO;
vert[i].Position.y = vertices[i].y * B2_PIXEL_RATIO;
vert[i].Color.r    = 255;
vert[i].Color.g    = 0;
vert[i].Color.b    = 0;
vert[i].Color.a    = 255;
vert[i].TexCoords.x = 0.0f;
vert[i].TexCoords.y = 0.0f;
}
wnd->Draw(vert, vertexCount, sf::Lines);
delete [] vert;
}
void DrawCircle(const b2Vec2& center, float32 radius, const b2Color& color)
{}
void DrawSolidCircle(const b2Vec2& center, float32 radius, const b2Vec2& axis, const b2Color& color)
{}
void DrawSegment(const b2Vec2& p1, const b2Vec2& p2, const b2Color& color)
{
}
void DrawTransform(const b2Transform& xf)
{}
};

int main()
{
sf::RenderWindow window(sf::VideoMode(800, 600), "SFML window");
sf::Vector2f winSize = window.GetDefaultView().GetSize();

sf::Vector2f shapeSize(100.0f, 30.0f);
sf::Vector2f shapePosition(winSize.x * 0.5f, winSize.y * 0.5f);

// Rect body
sf::RectangleShape rcShape;
rcShape.SetSize(shapeSize);
rcShape.SetOrigin(shapeSize * 0.5f);
rcShape.SetPosition(shapePosition);
rcShape.SetFillColor(sf::Color(255,255,0,255));

b2World  phWorld(b2Vec2(0.0f, 0.98f));
MyDebugDraw debugDraw(&window);
phWorld.SetDebugDraw(&debugDraw);
debugDraw.SetFlags(b2Draw::e_shapeBit);

b2BodyDef shapeBodyDef;
shapeBodyDef.type     = b2_dynamicBody;
shapeBodyDef.position = b2Vec2(shapePosition.x / B2_PIXEL_RATIO, shapePosition.y / B2_PIXEL_RATIO);
b2Body* shapeBody     = phWorld.CreateBody(&shapeBodyDef);

b2Vec2 vertices[4];
vertices[0].Set(0.0f, 0.0f);
vertices[1].Set(shapeSize.x / B2_PIXEL_RATIO, 0.0f);
vertices[2].Set(shapeSize.x / B2_PIXEL_RATIO, shapeSize.y / B2_PIXEL_RATIO);
vertices[3].Set(0.0f, shapeSize.y / B2_PIXEL_RATIO);
int32 count = 4;

b2PolygonShape rcPolyShape;
rcPolyShape.Set(vertices, 4);

b2FixtureDef rcShapeFixDef;
rcShapeFixDef.shape       = &rcPolyShape;
rcShapeFixDef.density     = 20.0f;
rcShapeFixDef.friction    = 0.4f;
rcShapeFixDef.restitution = 0.1f;
shapeBody->CreateFixture(&rcShapeFixDef);

// Surround screen with static edges
b2FixtureDef groundBoxDef;
b2BodyDef groundBodyDef;
groundBodyDef.position.Set(0,0);
b2Body* groundBody = phWorld.CreateBody(&groundBodyDef);

b2Vec2 vs[5];
vs[0].Set(winSize.x / B2_PIXEL_RATIO, 0.0f);
vs[1].Set(winSize.x / B2_PIXEL_RATIO, winSize.y / B2_PIXEL_RATIO);
vs[2].Set(0.0f, winSize.y / B2_PIXEL_RATIO);
vs[3].Set(0.0f, 0.0f);
vs[4].Set(winSize.x / B2_PIXEL_RATIO, 0.0f);
b2ChainShape wallShape;
wallShape.CreateChain(vs, 5);
groundBoxDef.shape = &wallShape;
groundBody->CreateFixture(&groundBoxDef);

static sf::Clock clock;
while(window.IsOpen())
{
sf::Event event;
while (window.PollEvent(event))
{
if (event.Type == sf::Event::Closed)
window.Close();
}

float timeStep = (float)clock.GetElapsedTime().AsMilliseconds() / 1000.0f;
phWorld.Step(timeStep, 10, 10);

float x = shapeBody->GetPosition().x * B2_PIXEL_RATIO;
float y = shapeBody->GetPosition().y * B2_PIXEL_RATIO;
rcShape.SetPosition(x, y);

window.Clear();
window.Draw(rcShape);
phWorld.DrawDebugData();
window.Display();
}
return EXIT_SUCCESS;
}



I can't see whats wrong.

Thanks for your time.

12

Graphics / SetOrigin on shapes

« on: March 04, 2012, 06:21:27 pm »

Suppose i have rectangle shape with size 100x30 and i use SetOrigin 50 , 15, does calling SetPosition moves shape based on Origin or top left corner of rectangle shape (0,0) ?

I have some weird offsets when draw debug data with Box2D.

Thanks for your time.

13

Graphics / Draw line

« on: March 03, 2012, 02:09:31 pm »

To use same thread for another stupid question.  :oops:

How can i setup view so that +Y axis is going from down-up, and X axis to stay same?

14

Graphics / Draw line

« on: March 03, 2012, 01:46:38 pm »

Found it!!!  

Thanks for your help, pointing into right search keywords.

http://www.sfml-dev.org/forum/viewtopic.php?p=42814&highlight=rectangleshape#42814

15

Graphics / Draw line

« on: March 03, 2012, 01:11:41 pm »

I am sorry, but i used search before posting my question and could not find nothing with "draw line" keywords.

I tried this but nothing displayed:

Code: [Select]


#include <iostream>

#include <SFML/Audio.hpp>
#include <SFML/Graphics.hpp>

#pragma comment(lib, "sfml-graphics-d.lib")
#pragma comment(lib, "sfml-window-d.lib")
#pragma comment(lib, "sfml-system-d.lib")
#pragma comment(lib, "sfml-audio-d.lib")

class Line : public sf::Shape
{
private:
sf::Vector2f pt[4];
public:
Line(const sf::Vector2f& pt1, const sf::Vector2f& pt2, float thick = 1.0f)
{
pt[0] = pt1 - sf::Vector2f((thick / 2.0f), (thick / 2.0f));
pt[1] = pt1 + sf::Vector2f((thick / 2.0f), (thick / 2.0f));
pt[2] = pt2 + sf::Vector2f((thick / 2.0f), (thick / 2.0f));
pt[3] = pt2 - sf::Vector2f((thick / 2.0f), (thick / 2.0f));
SetFillColor(sf::Color(255, 255, 255, 255));
}

unsigned int GetPointCount() const
{
return 4;
}

sf::Vector2f GetPoint(unsigned int index) const
{
return pt[index];
}
};


int main()
{
try
{
sf::RenderWindow window(sf::VideoMode(800, 600), "SFML window");

Line line = Line(sf::Vector2f(0.0f, 0.0f), sf::Vector2f(50.0f, 50.0f), 4.0f);

while (window.IsOpen())
{
sf::Event event;
while (window.PollEvent(event))
{
if (event.Type == sf::Event::Closed)
window.Close();
}

window.Clear();

window.Draw(line);

window.Display();
}
}
catch(const std::runtime_error& e)
{
std::cerr << e.what() << std::endl;
}

    return 0;
}



I am  really sorry but i am new to SMFL and C++.

Thanks for your time.

EDIT: Please, if you find time to point me to some of the topics about lines, i still can't find one.

Also, i have trouble to build quad given two points to simulate line, how should i calculate corner points?

And, in what order (CW or CCW) these points to be created?

Thanks in advance for your patience.