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BumpMap ... How to Change Sunlight to DynamicLights?
#385609
10/20/11 20:47
10/20/11 20:47
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Joined: Aug 2005
Posts: 142
Pattensen - Germany
REZ
OP
Member
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OP
Member
Joined: Aug 2005
Posts: 142
Pattensen - Germany
|
Hello, I did generate a bumpmap-effect, using FXED (Acknex Unlimited). Now I got the problem that I want to change this Shader to use Dynamic Lights instead of the Sun. Using A8.20 PRO. Here is the code: Main Script:
#include <acknex.h>
#include <default.c>
#include <mtlFX.c>
#include <mtlView.c>
#include <litec.h>
#include <d3d9.h>
#include "NormalMapping12.c";
(...)
NormalMapping12.c
BMAP* BlechNeu_bmap = "BlechNeu.bmp";
BMAP* BlechNeu_normal_bmap = "BlechNeu_normal.tga";
MATERIAL* mtlNormalMapping12 =
{
skin1 = BlechNeu_bmap;
skin2 = BlechNeu_normal_bmap;
effect = "NormalMapping12.fx";
}
action actNormalMapping12()
{
my.material = mtlNormalMapping12;
}
NormalMapping12.fx
// variables
float AmbientIntensity = 1.0f;
float DiffuseIntensity = 1.0f;
float SpecularIntensity = 2.0f;
float SpecularPower = 8.0f;
// vectors
float4 vecSunColor;
float4 vecSunDir;
float4 vecAmbient;
float4 vecViewPos;
// matrices
const float4x4 matWorldViewProj;
const float4x4 matWorld;
float3x3 matTangent;
// textures
texture entSkin1;
texture entSkin2;
// samplers
sampler base_sampler = sampler_state
{
Texture = <entSkin1>;
ADDRESSU = WRAP;
ADDRESSV = WRAP;
ADDRESSW = WRAP;
MAGFILTER = POINT;
MINFILTER = POINT;
MIPFILTER = LINEAR;
};
sampler normal_sampler = sampler_state
{
Texture = <entSkin2>;
ADDRESSU = WRAP;
ADDRESSV = WRAP;
ADDRESSW = WRAP;
MAGFILTER = POINT;
MINFILTER = POINT;
MIPFILTER = NONE;
};
// shader functions
void NormalMappingPass_VS(in float4 inPos : POSITION0,in float2 inTex : TEXCOORD0,in float3 inNormal : NORMAL0,in float4 inTangent : TEXCOORD2,out float4 outPos : POSITION0,out float2 outTex : TEXCOORD0,out float3 outViewDir : TEXCOORD1,out float3 outSunDir : TEXCOORD2)
{
outPos = mul(inPos, matWorldViewProj);
outTex = inTex;
matTangent[0] = mul(inTangent.xyz, matWorld);
matTangent[1] = mul(cross(inTangent.xyz, inNormal) * inTangent.w, matWorld);
matTangent[2] = mul(inNormal, matWorld);
outViewDir = normalize(mul(matTangent, vecViewPos - mul(inPos, matWorld)));
outSunDir = normalize(mul(matTangent, -vecSunDir));
}
void NormalMappingPass_PS(in float2 inTex : TEXCOORD0,in float3 inViewDir : TEXCOORD1,in float4 inSunDir : TEXCOORD2,out float4 outColor : COLOR0)
{
float3 BumpNormal = 2 * tex2D(normal_sampler, inTex) - 1;
float4 Ambient = AmbientIntensity * vecAmbient;
float4 Diffuse = DiffuseIntensity * saturate(dot(inSunDir, BumpNormal));
Diffuse *= vecSunColor;
float3 R = normalize(2 * dot(BumpNormal, inSunDir) * BumpNormal - inSunDir);
inViewDir = normalize(inViewDir);
float Specular = pow(saturate(dot(R, inViewDir)), SpecularPower) * SpecularIntensity;
float4 Color = tex2D(base_sampler, inTex);
outColor = (Ambient + Diffuse + Specular) * Color;
}
// techniques
technique ShaderTechnique
{
pass NormalMappingPass
{
VertexShader = compile vs_2_0 NormalMappingPass_VS();
PixelShader = compile ps_2_0 NormalMappingPass_PS();
}
}
// fallback
technique fallback { pass one { } }
So far it works :-) Then I tried to make the Shader using dynamic Lights, taken this code from the Wiki (Shader Hints, For the examples below, version 6.31.4 is required):
/// Use dynamic lights in a vertex shader
float4 vecLightPos[8];
float4 vecLightColor[8];
...
// return the dynamic light on the surface
float4 DoPointLight(float3 P, float3 N, int i)
{
// calculate the light ray pointing from the light to the surface
float3 D = (float3)vecLightPos[i]-P;
// calculate the angle between surface and light ray
float NdotL = dot(N,normalize(D));
// modulate the light by the surface angle
float4 Color = vecLightColor[i] * NdotL;
// calculate the light attenuation factor
float fac = 0.f;
if (NdotL >= 0.f && vecLightPos[i].w > 0.f)
{
// get the distance factor
float LD = length(D)/vecLightPos[i].w;
if (LD < 1.f)
fac = 1.f - LD;
}
return Color * fac;
}
VS_OUT TerrainLight_VS (
float4 inPos : POSITION,
float3 inNormal : NORMAL)
{
VS_OUT Out;
// transform the vector position to screen coordinates
Out.Pos = mul(inPos,matWorldViewProj);
// Terrains don't need to rotate the normal, but it must be normalized
float3 N = normalize(inNormal);
float3 P = mul(inPos,matWorld);
// Add 6 dynamic lights (maximum for vs 1.1)
Out.Color = float4(0.f,0.f,0.f,0.f);
for (int i=0; i<6; i++)
Out.Color += DoPointLight(P,N,i);
...
return Out;
}
And I did fit this code into mine ... new NormalMapping12.fx:
#include <lights>
// variables
float AmbientIntensity = 1.0f;
float DiffuseIntensity = 1.0f;
float SpecularIntensity = 2.0f;
float SpecularPower = 8.0f;
// vectors
// float4 vecSunColor;
// float4 vecSunDir;
/// Use dynamic lights in a vertex shader
float4 vecLightPos[8];
float4 vecLightColor[8];
float4 vecAmbient;
float4 vecViewPos;
// return the dynamic light on the surface
float4 DoPointLight(float3 P, float3 N, int i)
{
// calculate the light ray pointing from the light to the surface
float3 D = (float3)vecLightPos[i]-P;
// calculate the angle between surface and light ray
float NdotL = dot(N,normalize(D));
// modulate the light by the surface angle
float4 Color = vecLightColor[i] * NdotL;
// calculate the light attenuation factor
float fac = 0.f;
if (NdotL >= 0.f && vecLightPos[i].w > 0.f)
{
// get the distance factor
float LD = length(D)/vecLightPos[i].w;
if (LD < 1.f)
fac = 1.f - LD;
}
return Color * fac;
}
VS_OUT TerrainLight_VS (
float4 inPos : POSITION,
float3 inNormal : NORMAL)
{
VS_OUT Out;
// transform the vector position to screen coordinates
Out.Pos = mul(inPos,matWorldViewProj);
// Terrains don't need to rotate the normal, but it must be normalized
float3 N = normalize(inNormal);
float3 P = mul(inPos,matWorld);
// Add 6 dynamic lights (maximum for vs 1.1)
Out.Color = float4(0.f,0.f,0.f,0.f);
for (int i=0; i<6; i++)
Out.Color += DoPointLight(P,N,i);
return Out;
}
// matrices
const float4x4 matWorldViewProj;
const float4x4 matWorld;
float3x3 matTangent;
// textures
texture entSkin1;
texture entSkin2;
// samplers
sampler base_sampler = sampler_state
{
Texture = <entSkin1>;
ADDRESSU = WRAP;
ADDRESSV = WRAP;
ADDRESSW = WRAP;
MAGFILTER = POINT;
MINFILTER = POINT;
MIPFILTER = LINEAR;
};
sampler normal_sampler = sampler_state
{
Texture = <entSkin2>;
ADDRESSU = WRAP;
ADDRESSV = WRAP;
ADDRESSW = WRAP;
MAGFILTER = POINT;
MINFILTER = POINT;
MIPFILTER = NONE;
};
// shader functions
void NormalMappingPass_VS(in float4 inPos : POSITION0,in float2 inTex : TEXCOORD0,in float3 inNormal : NORMAL0,in float4 inTangent : TEXCOORD2,out float4 outPos : POSITION0,out float2 outTex : TEXCOORD0,out float3 outViewDir : TEXCOORD1,out float3 outSunDir : TEXCOORD2)
{
outPos = mul(inPos, matWorldViewProj);
outTex = inTex;
matTangent[0] = mul(inTangent.xyz, matWorld);
matTangent[1] = mul(cross(inTangent.xyz, inNormal) * inTangent.w, matWorld);
matTangent[2] = mul(inNormal, matWorld);
outViewDir = normalize(mul(matTangent, vecViewPos - mul(inPos, matWorld)));
outSunDir = normalize(mul(matTangent, -vecSunDir));
}
void NormalMappingPass_PS(in float2 inTex : TEXCOORD0,in float3 inViewDir : TEXCOORD1,in float4 inSunDir : TEXCOORD2,out float4 outColor : COLOR0)
{
float3 BumpNormal = 2 * tex2D(normal_sampler, inTex) - 1;
float4 Ambient = AmbientIntensity * vecAmbient;
float4 Diffuse = DiffuseIntensity * saturate(dot(inSunDir, BumpNormal));
Diffuse *= vecSunColor;
float3 R = normalize(2 * dot(BumpNormal, inSunDir) * BumpNormal - inSunDir);
inViewDir = normalize(inViewDir);
float Specular = pow(saturate(dot(R, inViewDir)), SpecularPower) * SpecularIntensity;
float4 Color = tex2D(base_sampler, inTex);
outColor = (Ambient + Diffuse + Specular) * Color;
}
// techniques
technique ShaderTechnique
{
pass NormalMappingPass
{
VertexShader = compile vs_2_0 NormalMappingPass_VS();
PixelShader = compile ps_2_0 NormalMappingPass_PS();
}
}
// fallback
technique fallback { pass one { } }
To me it looks like, that the reason is, that it does not work with the A 6.31 code from the Wiki. Does anyone know, how my code could be fixed, so that it works with dynamic Lights ok for A 8.20? Please do let me know :-) C.U. R.E.Z.
Last edited by REZ; 10/20/11 21:15.
R.E.Z. Software Development (TM)
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Re: BumpMap ... How to Change Sunlight to DynamicLights?
[Re: Aku_Aku]
#385615
10/20/11 21:10
10/20/11 21:10
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Joined: Aug 2005
Posts: 142
Pattensen - Germany
REZ
OP
Member
|
OP
Member
Joined: Aug 2005
Posts: 142
Pattensen - Germany
|
It did not work at all. BlackScreen
Only the original NormalMapping12.fx did work.
But the Sunlight is shining onto the shaded surface of the Model. But it is inside a Level and not meant to be shine on the the Sun.
C.U. R.E.Z.
R.E.Z. Software Development (TM)
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