Here’s a snippet for anyone who likes to have per pixel bumpmapping implemented into panda. It reacts (kind of) lifelike to viewposition and lightposition. Try it. Feedback is always appreciated
//Cg
//
//Cg profile arbvp1 arbfp1
void vshader( float4 vtx_position : POSITION,
float3 vtx_normal : NORMAL,
float3 vtx_binormal0 : BINORMAL,
float3 vtx_tangent0 : TANGENT,
float4 vtx_color : COLOR,
float3 vtx_texcoord0 : TEXCOORD0,
out float4 l_position : POSITION,
out float4 l_brite : TEXCOORD1,
out float3 l_texcoord0,
out float4 l_color : COLOR,
out float4 l_pointpos,
out float3 l_normal,
out float3 l_lightvec,
out float3 l_viewvec,
uniform float4x4 mat_modelproj,
uniform float4 mspos_light,
uniform float4 mspos_view)
{
l_position = mul(mat_modelproj, vtx_position);
float3 lightVector = ((float3)mspos_light - (float3)vtx_position);
l_lightvec.x = dot(vtx_tangent0, lightVector);
l_lightvec.y = -dot(vtx_binormal0, lightVector);
l_lightvec.z = dot(vtx_normal, lightVector);
float3 viewVector = ((float3)mspos_view - (float3)vtx_position);
l_viewvec.x = dot(vtx_tangent0, viewVector);
l_viewvec.y = -dot(vtx_binormal0, viewVector);
l_viewvec.z = dot(vtx_normal, viewVector);
l_texcoord0 = vtx_texcoord0;
l_color = vtx_color;
l_pointpos = vtx_position;
}
void fshader( float l_brite : TEXCOORD1,
float4 l_color : COLOR,
uniform float4 mspos_light,
uniform float4 mspos_view,
uniform float4 k_gloss,
sampler2D tex_0,
sampler2D tex_0_n,
float2 l_texcoord0,
float4 l_pointpos,
float3 l_lightvec,
float3 l_viewvec,
out float4 o_color : COLOR)
{
float distance = length(mspos_light - l_pointpos) + length(mspos_view - l_pointpos);
float attenuate = saturate(30.0 / (15.0 + distance));
float4 normalMap = tex2D(tex_0_n, l_texcoord0) * 2.0 - float4(1.0,
1.0, 1.0, 1.0);
float4 tex = tex2D(tex_0, l_texcoord0);
float3 halfAngle = normalize(normalize(l_lightvec) + normalize(l_viewvec) / 2.0);
l_brite = pow(dot((float3)normalMap, halfAngle), k_gloss.x);
float lightProd = saturate(dot(halfAngle, (float3)normalMap)+0.3);
o_color= (float4(0.2, 0.20, 0.20, 1.0) + l_brite) * lightProd * tex * attenuate;
o_color.a = tex.a;
}
I’m still looking for someone to give me hints on a multiple lightpass bumpmap shader, but i guess that’s something I have to find out for myself still.