void ShaderRenderer::screenPosToDirection(const Common::Point screen, float &pitch, float &heading) {
double x, y, z;
x = screen.x;
y = kOriginalHeight - screen.y;
z = 0.9f;
const Math::Vector2d tl = _viewport.getTopLeft();
x = 2 * double(x - tl.getX()) / _viewport.getWidth() - 1.0f;
y = 2 * double(y - tl.getY()) / _viewport.getHeight() - 1.0f;
z = 2 * z - 1.0f;
// Screen coords to 3D coords
Math::Vector4d point = Math::Vector4d(x, y, z, 1.0f);
point = _mvpMatrix * point;
// 3D coords to polar coords
Math::Vector3d v = Math::Vector3d(point.x(), point.y(), point.z());
v.normalize();
Math::Vector2d horizontalProjection = Math::Vector2d(v.x(), v.z());
horizontalProjection.normalize();
pitch = 90 - Math::Angle::arcCosine(v.y()).getDegrees();
heading = Math::Angle::arcCosine(horizontalProjection.getY()).getDegrees();
if (horizontalProjection.getX() > 0.0)
heading = 360 - heading;
}
void BaseRenderer::screenPosToDirection(const Common::Point screen, float &pitch, float &heading) {
// Screen coords to 3D coords
Math::Vector3d obj;
Math::gluMathUnProject(Math::Vector3d(screen.x, _system->getHeight() - screen.y, 0.9f), _mvpMatrix, frameViewport(), obj);
// 3D coords to polar coords
obj.normalize();
Math::Vector2d horizontalProjection = Math::Vector2d(obj.x(), obj.z());
horizontalProjection.normalize();
pitch = 90 - Math::Angle::arcCosine(obj.y()).getDegrees();
heading = Math::Angle::arcCosine(horizontalProjection.getY()).getDegrees();
if (horizontalProjection.getX() > 0.0)
heading = 360 - heading;
}
void TinyGLRenderer::screenPosToDirection(const Common::Point screen, float &pitch, float &heading) {
// Screen coords to 3D coords
Math::Vector3d obj;
Math::gluMathUnProject<float, int>(Math::Vector3d(screen.x, kOriginalHeight - screen.y, 0.9),
_cubeModelViewMatrix, _cubeProjectionMatrix, _cubeViewport, obj);
// 3D coords to polar coords
obj.normalize();
Math::Vector2d horizontalProjection = Math::Vector2d(obj.x(), obj.z());
horizontalProjection.normalize();
pitch = 90 - Math::Angle::arcCosine(obj.y()).getDegrees();
heading = Math::Angle::arcCosine(horizontalProjection.getY()).getDegrees();
if (horizontalProjection.getX() > 0.0)
heading = 360 - heading;
}
void Renderer::screenPosToDirection(const Common::Point screen, float &pitch, float &heading) {
double x, y, z;
// Screen coords to 3D coords
gluUnProject(screen.x, kOriginalHeight - screen.y, 0.9, _cubeModelViewMatrix, _cubeProjectionMatrix, (GLint *)_cubeViewport, &x, &y, &z);
// 3D coords to polar coords
Math::Vector3d v = Math::Vector3d(x, y, z);
v.normalize();
Math::Vector2d horizontalProjection = Math::Vector2d(v.x(), v.z());
horizontalProjection.normalize();
pitch = 90 - Math::Angle::arcCosine(v.y()).getDegrees();
heading = Math::Angle::arcCosine(horizontalProjection.getY()).getDegrees();
if (horizontalProjection.getX() > 0.0)
heading = 360 - heading;
}
void SurfaceSdlGraphicsManager::drawTexture(const Graphics::Texture &tex, const Math::Vector2d &topLeft, const Math::Vector2d &bottomRight, bool flip) {
#ifndef USE_OPENGL_SHADERS
// Save current state
glPushAttrib(GL_TRANSFORM_BIT | GL_ENABLE_BIT | GL_DEPTH_BUFFER_BIT | GL_SCISSOR_BIT);
// prepare view
glMatrixMode(GL_PROJECTION);
glPushMatrix();
glLoadIdentity();
glOrtho(0, 1.0, 1.0, 0, 0, 1);
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glLoadIdentity();
glMatrixMode(GL_TEXTURE);
glPushMatrix();
glLoadIdentity();
glDisable(GL_LIGHTING);
glEnable(GL_TEXTURE_2D);
glDisable(GL_DEPTH_TEST);
glDisable(GL_ALPHA_TEST);
glDepthMask(GL_FALSE);
float texcropX = tex.getWidth() / float(tex.getTexWidth());
float texcropY = tex.getHeight() / float(tex.getTexHeight());
float texTop = flip ? 0.0 : texcropY;
float texBottom = flip ? texcropY : 0.0;
float offsetX = topLeft.getX();
float offsetY = topLeft.getY();
float sizeX = fabsf(topLeft.getX() - bottomRight.getX());
float sizeY = fabsf(topLeft.getY() - bottomRight.getY());
glColor4f(1.0, 1.0, 1.0, 1.0);
glBindTexture(GL_TEXTURE_2D, tex.getTextureName());
glBegin(GL_QUADS);
glTexCoord2f(0, texTop);
glVertex2f(offsetX, offsetY);
glTexCoord2f(texcropX, texTop);
glVertex2f(offsetX + sizeX, offsetY);
glTexCoord2f(texcropX, texBottom);
glVertex2f(offsetX + sizeX, offsetY + sizeY);
glTexCoord2f(0.0, texBottom);
glVertex2f(offsetX, offsetY + sizeY);
glEnd();
// Restore previous state
glMatrixMode(GL_PROJECTION);
glPopMatrix();
glMatrixMode(GL_MODELVIEW);
glPopMatrix();
glMatrixMode(GL_TEXTURE);
glPopMatrix();
glPopAttrib();
#else
glBindTexture(GL_TEXTURE_2D, tex.getTextureName());
_boxShader->use();
float texcropX = tex.getWidth() / float(tex.getTexWidth());
float texcropY = tex.getHeight() / float(tex.getTexHeight());
_boxShader->setUniform("texcrop", Math::Vector2d(texcropX, texcropY));
_boxShader->setUniform("flipY", flip);
_boxShader->setUniform("offsetXY", topLeft);
_boxShader->setUniform("sizeWH", Math::Vector2d(fabsf(topLeft.getX() - bottomRight.getX()), fabsf(topLeft.getY() - bottomRight.getY())));
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glBindTexture(GL_TEXTURE_2D, 0);
#endif
}