Hello, I'm learning actually how to use OpenGL with Ruby. I done this simple scene class actually to test all OpenGL capability. And I have a problem with my part titled: #DRAW THE GROUND
I would like to draw this quad with the texture as tiled. I try to change every thing, but nothing. Every time this quad show only one time my texture. What is the problem ? I recognize I'm a little bit lost with the U/V coordinates and 3D coordinates of my vertex when I'm using a texture. For example, with textured quad, how can I set the angle of my quad ?:
class Test3D < GameScene
def initialize
@texture = Gosu::Image.new('Test.png')
@texture1 = Gosu::Image.new('Test1.png', {tileable: true})
@texture2 = Gosu::Image.new('Tree.png')
@texture3 = Gosu::Image.new('Character.png')
@backgroundMusic = Gosu::Song.new("Test.wav")
@backgroundMusic.play(true)
end
def draw
Gosu.gl do
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glEnable(GL_TEXTURE_2D)
glEnable(GL_DEPTH_TEST)
glMatrixMode(GL_PROJECTION)
glLoadIdentity
gluPerspective(45.0, $gameWindow.width.to_f / $gameWindow.height.to_f, 1, 1000)
glMatrixMode(GL_MODELVIEW)
glLoadIdentity
gluLookAt(0,-640,250,0,0,0,0,0,1)
#DRAW THE BUILDING
glBindTexture(GL_TEXTURE_2D, @texture.gl_tex_info.tex_name)
glPushMatrix
glScalef(@texture.width, 0, @texture.height)
glBegin(GL_QUADS)
glTexCoord2d(@texture.gl_tex_info.left,@texture.gl_tex_info.bottom)
glVertex3f(-0.5, 0.0, 0.0)
glTexCoord2d(@texture.gl_tex_info.right,@texture.gl_tex_info.bottom)
glVertex3f(0.5, 0.0, 0.0)
glTexCoord2d(@texture.gl_tex_info.right,@texture.gl_tex_info.top)
glVertex3f(0.5, 0.0, 1.0)
glTexCoord2d(@texture.gl_tex_info.left,@texture.gl_tex_info.top)
glVertex3f(-0.5, 0.0, 1.0)
glEnd
glPopMatrix
#DRAW THE GROUND
glBindTexture(GL_TEXTURE_2D, @texture1.gl_tex_info.tex_name)
glPushMatrix
glScalef(@texture1.width, @texture1.height, 0)
glBegin(GL_QUADS)
glTexCoord2d(@texture1.gl_tex_info.left,@texture1.gl_tex_info.bottom)
glVertex3f(-512/2, -512/2, 0.0)
glTexCoord2d(@texture1.gl_tex_info.right,@texture1.gl_tex_info.bottom)
glVertex3f(512/2, -512/2, 0.0)
glTexCoord2d(@texture1.gl_tex_info.right,@texture1.gl_tex_info.top)
glVertex3f(512/2, 512/2, 0.0)
glTexCoord2d(@texture1.gl_tex_info.left,@texture1.gl_tex_info.top)
glVertex3f(-512/2, 512/2, 0.0)
glEnd
glPopMatrix
#DRAW A TREE
glBindTexture(GL_TEXTURE_2D, @texture2.gl_tex_info.tex_name)
glEnable(GL_ALPHA_TEST)
glAlphaFunc(GL_GREATER,0)
glPushMatrix
glTranslatef(64*3,64,0)
glScalef(@texture2.width,@texture2.height, @texture2.height)
glBegin(GL_QUADS)
glTexCoord2d(@texture2.gl_tex_info.left,@texture2.gl_tex_info.bottom)
glVertex3f(-0.5, 0.0, 0.0)
glTexCoord2d(@texture2.gl_tex_info.right,@texture2.gl_tex_info.bottom)
glVertex3f(0.5, 0.0, 0.0)
glTexCoord2d(@texture2.gl_tex_info.right,@texture2.gl_tex_info.top)
glVertex3f(0.5, 0.0, 1.0)
glTexCoord2d(@texture2.gl_tex_info.left,@texture2.gl_tex_info.top)
glVertex3f(-0.5, 0.0, 1.0)
glEnd
glDisable(GL_ALPHA_TEST)
glPopMatrix
#DRAW A CHARACTER
glBindTexture(GL_TEXTURE_2D, @texture3.gl_tex_info.tex_name)
glEnable(GL_ALPHA_TEST)
glAlphaFunc(GL_GREATER,0)
glPushMatrix
glTranslatef(0,-64,1)
glScalef(@texture3.width,@texture3.height,@texture3.height)
glBegin(GL_QUADS)
glTexCoord2d(@texture3.gl_tex_info.left,@texture3.gl_tex_info.bottom)
glVertex3f(-0.5, 0.0, 0.0)
glTexCoord2d(@texture3.gl_tex_info.right,@texture3.gl_tex_info.bottom)
glVertex3f(0.5, 0.0, 0.0)
glTexCoord2d(@texture3.gl_tex_info.right,@texture3.gl_tex_info.top)
glVertex3f(0.5, 0.0, 1.0)
glTexCoord2d(@texture3.gl_tex_info.left,@texture3.gl_tex_info.top)
glVertex3f(-0.5, 0.0, 1.0)
glEnd
glDisable(GL_ALPHA_TEST)
glPopMatrix
end
end
end
