help with opengl

[AdamStrangeParticipant]

OK, I’ve a bit of code to do some basic opengl + glsl:

Monkey

#Import "<mojo>" Using std.. Using mojo.. Using gles20.. #import "matrix" Function glLoadProgram:GLuint(vertexSource:String, fragmentSource:String) Local vs := glCompile( GL_VERTEX_SHADER, vertexSource ) Local fs := glCompile( GL_FRAGMENT_SHADER, fragmentSource ) Local program := glCreateProgram() glAttachShader( program, vs ) glAttachShader( program, fs ) glLink( program ) glDeleteShader( vs ) glDeleteShader( fs ) Return program End Function LoadSimpleShader:GLuint() Local vertex:String = " uniform mat4 Matrix; attribute vec3 mPosition; attribute vec3 mColor; attribute vec3 BANG; varying vec3 OutColor; void main() { // gl_Position = vec4( mPosition, 1); gl_Position = Matrix * vec4( mPosition, 1); OutColor = mColor; } " Local fragment:String = " varying vec3 OutColor; void main() { gl_FragColor = vec4(OutColor, 0); } " local program:int = glLoadProgram(vertex, fragment) Return program End Class MyWindow Extends GLWindow Field vbo:GLuint Field ebo:GLuint Field shader:GLuint Field elementsLength:Int Field matrixView:Matrix Field matrixProjection:Matrix Field matrixViewProjection:Matrix Field matrixUniform:Int field sColor:int field sPosition:int field sNormal:int field sUV:int field sData:int Method New() glClearColor(0.1, 0.1, 0.5, 1.0) glEnable(GL_DEPTH_TEST) glEnable(GL_CULL_FACE) 'color, position, normal, uv, data Local vertices:Float[] = New Float[]( 1, 0, 0, -1,1,-1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1,1,-1, 0, 0.5, 0, 0, 0, 0, 0, 0, 1, 1,1,1, 0, 1, 0, 0, 0, 0, 1, 0.5, 0, -1,1,1, 0, 1, 0, 0, 0, 0, 1, 0, 0, -1,-1,-1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1,-1,-1, 0, 0.5, 0, 0, 0, 1, 0, 0, 1, 1,-1,1, 0, 1, 0, 0, 0, 1, 1, 0.5, 0, -1, -1,1, 0, 1, 0, 0, 0, 1) 'NOTE anticlockwise winding!!!!!! Local elements:int[] = New Int[]( ' 0, 2, 1) 'single triangle top ' 0, 2, 1, 0, 3, 2) 'top 0, 2, 1, 0, 3, 2, 4, 5, 6, 4, 6, 7, 0, 4, 3, 4, 7, 3) 'top bottom and side elementsLength = elements.Length local max_attribs:int glGetIntegerv( GL_MAX_VERTEX_ATTRIBS, Varptr max_attribs ) Print "max attributes= "+max_attribs ' Load Shader shader = LoadSimpleShader() sColor = glGetAttribLocation( shader, "mColor" ) sPosition = glGetAttribLocation( shader, "mPosition" ) sNormal = glGetAttribLocation( shader, "mNormal" ) sUV = glGetAttribLocation( shader, "mUV" ) sData = glGetAttribLocation( shader, "mData" ) Print "Program ID: " + shader Print "Color Location: " + sColor Print "Position Location: " + sPosition Print "Normal Location: " + sNormal Print "UV Location: " + sUV Print "Data Location: " + sData ' Create vertex buffer glGenBuffers(1, Varptr vbo) glBindBuffer(GL_ARRAY_BUFFER, vbo) glBufferData(GL_ARRAY_BUFFER, vertices.Length * 4, vertices.Data, GL_STATIC_DRAW) ' create element buffer glGenBuffers(1, Varptr ebo) glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo) glBufferData(GL_ELEMENT_ARRAY_BUFFER, elements.Length * 4, elements.Data, GL_STATIC_DRAW) ' create matrix stuff matrixProjection = Matrix.Perspective(Pi / 4.0, Cast<Float>(Width)/Height, 0.5, 100) matrixViewProjection = New Matrix matrixUniform = glGetUniformLocation(shader, "Matrix") End Method OnRender(canvas:mojo.graphics.Canvas) Override App.RequestRender() Super.OnRender(canvas) canvas.DrawText("Monkey2 OpenGL Test ", 10, 10) canvas.Color = Color.White canvas.DrawLine( 0, Height*0.5, Width, Height * 0.5 ) canvas.DrawLine( Width*0.5, 0, Width*0.5, Height ) End Method OnRenderGL() Override ' update the view projection matrix ' matrixView = Matrix.RotateY(App.Millisecs * -0.0005) * Matrix.RotateX(Sin(App.Millisecs*0.0001)) matrixView = Matrix.RotateY( App.Millisecs * -0.0005 ) * Matrix.RotateX(1) matrixView *= Matrix.Translation( 0.5, 0, -5 ) matrixViewProjection = matrixView * matrixProjection ' use the shader and update the matrix uniform glUseProgram( shader ) glUniformMatrix4fv( matrixUniform, 1, False, matrixViewProjection.ToArray.Data ) glBindBuffer(GL_ARRAY_BUFFER, vbo) glEnableVertexAttribArray( sColor ) glEnableVertexAttribArray( sPosition ) glEnableVertexAttribArray( sNormal ) glEnableVertexAttribArray( sUV ) glEnableVertexAttribArray( sData ) glVertexAttribPointer( sColor, 3, GL_FLOAT, False, 48, Cast<Void Ptr>(0) ) glVertexAttribPointer( sPosition, 3, GL_FLOAT, true, 48, Cast<Void Ptr>(12) ) glVertexAttribPointer( sNormal, 3, GL_FLOAT, False, 48, Cast<Void Ptr>(24) ) glVertexAttribPointer( sUV, 2, GL_FLOAT, False, 48, Cast<Void Ptr>(36) ) glVertexAttribPointer( sData, 1, GL_FLOAT, False, 48, Cast<Void Ptr>(44) ) ' bind the element buffer object glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, ebo ) ' finally do the drawing glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ) glDrawElements( GL_TRIANGLES, elementsLength, GL_UNSIGNED_INT, Cast<Int Ptr>(0) ) End End Function Main() New AppInstance New MyWindow App.Run() End

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187

#Import "<mojo>" Using std.. Using mojo.. Using gles20..   #import "matrix"   Function glLoadProgram:GLuint(vertexSource:String, fragmentSource:String) Local vs := glCompile( GL_VERTEX_SHADER, vertexSource ) Local fs := glCompile( GL_FRAGMENT_SHADER, fragmentSource ) Local program := glCreateProgram() glAttachShader( program, vs ) glAttachShader( program, fs ) glLink( program ) glDeleteShader( vs ) glDeleteShader( fs ) Return program End Function LoadSimpleShader:GLuint() Local vertex:String = " uniform mat4 Matrix; attribute vec3 mPosition; attribute vec3 mColor; attribute vec3 BANG; varying vec3 OutColor; void main() { // gl_Position = vec4( mPosition, 1); gl_Position = Matrix * vec4( mPosition, 1); OutColor = mColor; } " Local fragment:String = " varying vec3 OutColor; void main() { gl_FragColor = vec4(OutColor, 0); } " local program:int = glLoadProgram(vertex, fragment) Return program End Class MyWindow Extends GLWindow Field vbo:GLuint Field ebo:GLuint Field shader:GLuint Field elementsLength:Int   Field matrixView:Matrix Field matrixProjection:Matrix Field matrixViewProjection:Matrix Field matrixUniform:Int field sColor:int field sPosition:int field sNormal:int field sUV:int field sData:int   Method New() glClearColor(0.1, 0.1, 0.5, 1.0)   glEnable(GL_DEPTH_TEST) glEnable(GL_CULL_FACE)   'color, position, normal, uv, data Local vertices:Float[] = New Float[]( 1, 0, 0, -1,1,-1, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1,1,-1, 0, 0.5, 0, 0, 0, 0, 0, 0, 1, 1,1,1, 0, 1, 0, 0, 0, 0, 1, 0.5, 0, -1,1,1, 0, 1, 0, 0, 0, 0, 1, 0, 0, -1,-1,-1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 1,-1,-1, 0, 0.5, 0, 0, 0, 1, 0, 0, 1, 1,-1,1, 0, 1, 0, 0, 0, 1, 1, 0.5, 0, -1, -1,1, 0, 1, 0, 0, 0, 1)     'NOTE anticlockwise winding!!!!!! Local elements:int[] = New Int[]( ' 0, 2, 1) 'single triangle top   ' 0, 2, 1, 0, 3, 2) 'top   0, 2, 1, 0, 3, 2, 4, 5, 6, 4, 6, 7, 0, 4, 3, 4, 7, 3) 'top bottom and side   elementsLength = elements.Length   local max_attribs:int glGetIntegerv( GL_MAX_VERTEX_ATTRIBS, Varptr max_attribs ) Print "max attributes= "+max_attribs ' Load Shader shader = LoadSimpleShader() sColor = glGetAttribLocation( shader, "mColor" ) sPosition = glGetAttribLocation( shader, "mPosition" ) sNormal = glGetAttribLocation( shader, "mNormal" ) sUV = glGetAttribLocation( shader, "mUV" ) sData = glGetAttribLocation( shader, "mData" )   Print "Program ID: " + shader Print "Color Location: " + sColor Print "Position Location: " + sPosition Print "Normal Location: " + sNormal Print "UV Location: " + sUV Print "Data Location: " + sData ' Create vertex buffer glGenBuffers(1, Varptr vbo) glBindBuffer(GL_ARRAY_BUFFER, vbo) glBufferData(GL_ARRAY_BUFFER, vertices.Length * 4, vertices.Data, GL_STATIC_DRAW) ' create element buffer glGenBuffers(1, Varptr ebo) glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, ebo) glBufferData(GL_ELEMENT_ARRAY_BUFFER, elements.Length * 4, elements.Data, GL_STATIC_DRAW)   ' create matrix stuff matrixProjection = Matrix.Perspective(Pi / 4.0, Cast<Float>(Width)/Height, 0.5, 100) matrixViewProjection = New Matrix matrixUniform = glGetUniformLocation(shader, "Matrix") End   Method OnRender(canvas:mojo.graphics.Canvas) Override App.RequestRender() Super.OnRender(canvas)   canvas.DrawText("Monkey2 OpenGL Test ", 10, 10) canvas.Color = Color.White canvas.DrawLine( 0, Height*0.5, Width, Height * 0.5 ) canvas.DrawLine( Width*0.5, 0, Width*0.5, Height ) End   Method OnRenderGL() Override ' update the view projection matrix ' matrixView = Matrix.RotateY(App.Millisecs * -0.0005) * Matrix.RotateX(Sin(App.Millisecs*0.0001)) matrixView = Matrix.RotateY( App.Millisecs * -0.0005 ) * Matrix.RotateX(1) matrixView *= Matrix.Translation( 0.5, 0, -5 ) matrixViewProjection = matrixView * matrixProjection   ' use the shader and update the matrix uniform glUseProgram( shader ) glUniformMatrix4fv( matrixUniform, 1, False, matrixViewProjection.ToArray.Data )   glBindBuffer(GL_ARRAY_BUFFER, vbo) glEnableVertexAttribArray( sColor ) glEnableVertexAttribArray( sPosition ) glEnableVertexAttribArray( sNormal ) glEnableVertexAttribArray( sUV ) glEnableVertexAttribArray( sData ) glVertexAttribPointer( sColor, 3, GL_FLOAT, False, 48, Cast<Void Ptr>(0) ) glVertexAttribPointer( sPosition, 3, GL_FLOAT, true, 48, Cast<Void Ptr>(12) ) glVertexAttribPointer( sNormal, 3, GL_FLOAT, False, 48, Cast<Void Ptr>(24) ) glVertexAttribPointer( sUV, 2, GL_FLOAT, False, 48, Cast<Void Ptr>(36) ) glVertexAttribPointer( sData, 1, GL_FLOAT, False, 48, Cast<Void Ptr>(44) ) ' bind the element buffer object glBindBuffer( GL_ELEMENT_ARRAY_BUFFER, ebo ) ' finally do the drawing glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT ) glDrawElements( GL_TRIANGLES, elementsLength, GL_UNSIGNED_INT, Cast<Int Ptr>(0) ) End End Function Main() New AppInstance New MyWindow App.Run() End

It should be pretty obvious what is does:

It draws the top and side of a cube that is rotating, with vertex colors. so far so good.

What is not working is the ability to defines and reference the normal, uv and data parameters I am wanting to feed into the shader.

checking the glGetAttributelocation return -1 for these 3.

I’ve tried bindings them, but just can’t get it to work.

 

Anyone have any suggestions what I’m doing wrong here?

 

Here’s the matrix.monkey2 code to go with it…

Monkey

Class Matrix ' Matrix class is based on Monogame math. Private Field data:Float[] = New Float[16] Public Field M11:Float, M12:Float, M13:Float, M14:Float Field M21:Float, M22:Float, M23:Float, M24:Float Field M31:Float, M32:Float, M33:Float, M34:Float Field M41:Float, M42:Float, M43:Float, M44:Float Property ToArray:Float[]() data[0] = M11 data[1] = M12 data[2] = M13 data[3] = M14 data[4] = M21 data[5] = M22 data[6] = M23 data[7] = M24 data[8] = M31 data[9] = M32 data[10] = M33 data[11] = M34 data[12] = M41 data[13] = M42 data[14] = M43 data[15] = M44 Return data End Operator*:Matrix(matrix:Matrix) Local result := New Matrix result.M11 = (Self.M11 * matrix.M11) + (Self.M12 * matrix.M21) + (Self.M13 * matrix.M31) + (Self.M14 * matrix.M41) result.M12 = (Self.M11 * matrix.M12) + (Self.M12 * matrix.M22) + (Self.M13 * matrix.M32) + (Self.M14 * matrix.M42) result.M13 = (Self.M11 * matrix.M13) + (Self.M12 * matrix.M23) + (Self.M13 * matrix.M33) + (Self.M14 * matrix.M43) result.M14 = (Self.M11 * matrix.M14) + (Self.M12 * matrix.M24) + (Self.M13 * matrix.M34) + (Self.M14 * matrix.M44) result.M21 = (Self.M21 * matrix.M11) + (Self.M22 * matrix.M21) + (Self.M23 * matrix.M31) + (Self.M24 * matrix.M41) result.M22 = (Self.M21 * matrix.M12) + (Self.M22 * matrix.M22) + (Self.M23 * matrix.M32) + (Self.M24 * matrix.M42) result.M23 = (Self.M21 * matrix.M13) + (Self.M22 * matrix.M23) + (Self.M23 * matrix.M33) + (Self.M24 * matrix.M43) result.M24 = (Self.M21 * matrix.M14) + (Self.M22 * matrix.M24) + (Self.M23 * matrix.M34) + (Self.M24 * matrix.M44) result.M31 = (Self.M31 * matrix.M11) + (Self.M32 * matrix.M21) + (Self.M33 * matrix.M31) + (Self.M34 * matrix.M41) result.M32 = (Self.M31 * matrix.M12) + (Self.M32 * matrix.M22) + (Self.M33 * matrix.M32) + (Self.M34 * matrix.M42) result.M33 = (Self.M31 * matrix.M13) + (Self.M32 * matrix.M23) + (Self.M33 * matrix.M33) + (Self.M34 * matrix.M43) result.M34 = (Self.M31 * matrix.M14) + (Self.M32 * matrix.M24) + (Self.M33 * matrix.M34) + (Self.M34 * matrix.M44) result.M41 = (Self.M41 * matrix.M11) + (Self.M42 * matrix.M21) + (Self.M43 * matrix.M31) + (Self.M44 * matrix.M41) result.M42 = (Self.M41 * matrix.M12) + (Self.M42 * matrix.M22) + (Self.M43 * matrix.M32) + (Self.M44 * matrix.M42) result.M43 = (Self.M41 * matrix.M13) + (Self.M42 * matrix.M23) + (Self.M43 * matrix.M33) + (Self.M44 * matrix.M43) result.M44 = (Self.M41 * matrix.M14) + (Self.M42 * matrix.M24) + (Self.M43 * matrix.M34) + (Self.M44 * matrix.M44) Return result End Function Identity:Matrix() Local result := New Matrix result.M11 = 1.0 result.M22 = 1.0 result.M33 = 1.0 result.M44 = 1.0 Return result End Function Translation:Matrix(x:Float, y:Float, z:Float) Local result := Identity() result.M41 = x result.M42 = y result.M43 = z Return result End Function RotateX:Matrix(angle:Float) Local cos:Float = Cast<Float>(Cos(angle)) Local sin:Float = Cast<Float>(Sin(angle)) Local result := Identity() result.M22 = cos result.M23 = sin result.M32 = -sin result.M33 = cos Return result End Function RotateY:Matrix(angle:Float) Local cos:Float = Cast<Float>(Cos(angle)) Local sin:Float = Cast<Float>(Sin(angle)) Local result := Identity() result.M11 = cos result.M13 = -sin result.M31 = sin result.M33 = cos Return result End Function Perspective:Matrix(fovy:Float, aspect:Float, near:Float, far:float) Local yMax:Float = near * Tan(0.5 * fovy) Local yMin:Float = -yMax Local xMin:Float = yMin * aspect Local xMax:Float = yMax * aspect Return Frustum(xMin, xMax, yMin, yMax, near, far) End Function Frustum:Matrix(left:Float, right:Float, bottom:Float, top:Float, near:Float, far:Float) Local invRL:Float = 1.0 / (right - left) Local invTB:Float = 1.0 / (top - bottom) Local invFN:Float = 1.0 / (far - near) Local result := New Matrix() result.M11 = 2.0 * near * invRL result.M12 = 0.0 result.M13 = 0.0 result.M14 = 0.0 result.M21 = 0.0 result.M22 = 2.0 * near * invTB result.M23 = 0.0 result.M24 = 0.0 result.M31 = (right + left) * invRL result.M32 = (top + bottom) * invTB result.M33 = -(far + near) * invFN result.M34 = -1.0 result.M41 = 0.0 result.M42 = 0.0 result.M43 = -2.0 * far * near * invFN result.M44 = 0.0 Return result End End

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138

Class Matrix ' Matrix class is based on Monogame math. Private Field data:Float[] = New Float[16] Public Field M11:Float, M12:Float, M13:Float, M14:Float Field M21:Float, M22:Float, M23:Float, M24:Float Field M31:Float, M32:Float, M33:Float, M34:Float Field M41:Float, M42:Float, M43:Float, M44:Float Property ToArray:Float[]() data[0] = M11 data[1] = M12 data[2] = M13 data[3] = M14 data[4] = M21 data[5] = M22 data[6] = M23 data[7] = M24 data[8] = M31 data[9] = M32 data[10] = M33 data[11] = M34 data[12] = M41 data[13] = M42 data[14] = M43 data[15] = M44 Return data End Operator*:Matrix(matrix:Matrix) Local result := New Matrix result.M11 = (Self.M11 * matrix.M11) + (Self.M12 * matrix.M21) + (Self.M13 * matrix.M31) + (Self.M14 * matrix.M41) result.M12 = (Self.M11 * matrix.M12) + (Self.M12 * matrix.M22) + (Self.M13 * matrix.M32) + (Self.M14 * matrix.M42) result.M13 = (Self.M11 * matrix.M13) + (Self.M12 * matrix.M23) + (Self.M13 * matrix.M33) + (Self.M14 * matrix.M43) result.M14 = (Self.M11 * matrix.M14) + (Self.M12 * matrix.M24) + (Self.M13 * matrix.M34) + (Self.M14 * matrix.M44) result.M21 = (Self.M21 * matrix.M11) + (Self.M22 * matrix.M21) + (Self.M23 * matrix.M31) + (Self.M24 * matrix.M41) result.M22 = (Self.M21 * matrix.M12) + (Self.M22 * matrix.M22) + (Self.M23 * matrix.M32) + (Self.M24 * matrix.M42) result.M23 = (Self.M21 * matrix.M13) + (Self.M22 * matrix.M23) + (Self.M23 * matrix.M33) + (Self.M24 * matrix.M43) result.M24 = (Self.M21 * matrix.M14) + (Self.M22 * matrix.M24) + (Self.M23 * matrix.M34) + (Self.M24 * matrix.M44) result.M31 = (Self.M31 * matrix.M11) + (Self.M32 * matrix.M21) + (Self.M33 * matrix.M31) + (Self.M34 * matrix.M41) result.M32 = (Self.M31 * matrix.M12) + (Self.M32 * matrix.M22) + (Self.M33 * matrix.M32) + (Self.M34 * matrix.M42) result.M33 = (Self.M31 * matrix.M13) + (Self.M32 * matrix.M23) + (Self.M33 * matrix.M33) + (Self.M34 * matrix.M43) result.M34 = (Self.M31 * matrix.M14) + (Self.M32 * matrix.M24) + (Self.M33 * matrix.M34) + (Self.M34 * matrix.M44) result.M41 = (Self.M41 * matrix.M11) + (Self.M42 * matrix.M21) + (Self.M43 * matrix.M31) + (Self.M44 * matrix.M41) result.M42 = (Self.M41 * matrix.M12) + (Self.M42 * matrix.M22) + (Self.M43 * matrix.M32) + (Self.M44 * matrix.M42) result.M43 = (Self.M41 * matrix.M13) + (Self.M42 * matrix.M23) + (Self.M43 * matrix.M33) + (Self.M44 * matrix.M43) result.M44 = (Self.M41 * matrix.M14) + (Self.M42 * matrix.M24) + (Self.M43 * matrix.M34) + (Self.M44 * matrix.M44) Return result End Function Identity:Matrix() Local result := New Matrix result.M11 = 1.0 result.M22 = 1.0 result.M33 = 1.0 result.M44 = 1.0 Return result End Function Translation:Matrix(x:Float, y:Float, z:Float) Local result := Identity() result.M41 = x result.M42 = y result.M43 = z Return result End Function RotateX:Matrix(angle:Float) Local cos:Float = Cast<Float>(Cos(angle)) Local sin:Float = Cast<Float>(Sin(angle))         Local result := Identity() result.M22 = cos result.M23 = sin result.M32 = -sin result.M33 = cos Return result End Function RotateY:Matrix(angle:Float)         Local cos:Float = Cast<Float>(Cos(angle)) Local sin:Float = Cast<Float>(Sin(angle))         Local result := Identity() result.M11 =  cos result.M13 = -sin result.M31 =  sin result.M33 =  cos Return result End Function Perspective:Matrix(fovy:Float, aspect:Float, near:Float, far:float) Local yMax:Float = near * Tan(0.5 * fovy) Local yMin:Float = -yMax Local xMin:Float = yMin * aspect Local xMax:Float = yMax * aspect Return Frustum(xMin, xMax, yMin, yMax, near, far) End Function Frustum:Matrix(left:Float, right:Float, bottom:Float, top:Float, near:Float, far:Float) Local invRL:Float = 1.0 / (right - left) Local invTB:Float = 1.0 / (top - bottom) Local invFN:Float = 1.0 / (far - near) Local result := New Matrix() result.M11 = 2.0 * near * invRL result.M12 = 0.0 result.M13 = 0.0 result.M14 = 0.0 result.M21 = 0.0 result.M22 = 2.0 * near * invTB result.M23 = 0.0 result.M24 = 0.0 result.M31 = (right + left) * invRL result.M32 = (top + bottom) * invTB result.M33 = -(far + near) * invFN result.M34 = -1.0 result.M41 = 0.0 result.M42 = 0.0 result.M43 = -2.0 * far * near * invFN result.M44 = 0.0 Return result End End

[Mark SiblyKeymaster]

The shader compiler may be optimizing out normal, color etc if they’re not actually used by the shader which they don’t appear to be.

Another way to deal with attribs is to use glBindAttribLocation instead (after compiling but *before* linking) to ‘force’ attribs to go into fixed locations, position=0, normal=1, color=2 etc.

[AdamStrangeParticipant]

thanks mark, thats good information

[Author]

Posts