Initial commit:

PhysX 3.4.0 Update @ 21294896
APEX 1.4.0 Update @ 21275617

[CL 21300167]

1 files changed, 48 insertions, 0 deletions

diff --git a/APEX_1.4/samples_v2/SampleBase/shaders/lighting.hlsl b/APEX_1.4/samples_v2/SampleBase/shaders/lighting.hlsl
new file mode 100644
index 00000000..6609dffa
--- /dev/null
+++ b/APEX_1.4/samples_v2/SampleBase/shaders/lighting.hlsl
@@ -0,0 +1,48 @@
+#include "common_buffers.hlsl"
+
+static const float att_c = 1.0f;
+static const float att_l = 0.014f;
+static const float att_q = 0.0007f;
+
+
+float CalcAttenuation(float distance)
+{
+	return 1 / (att_c + att_l * distance + att_q * distance * distance);
+};
+
+
+float4 CalcLight(float4 textureColor, float3 lightDir, float3 viewDir, float3 normal, float3 lightColor, float specPower, float specIntensity, float attenuation)
+{
+	normal = normalize(normal);
+
+	// diffuse
+	float3 dirToLight = normalize(-lightDir);
+	float diffuseFactor = max(dot(normal, dirToLight), 0.0);
+	float4 diffuse = float4(lightColor, 1) * textureColor * diffuseFactor * attenuation;
+
+	// specular (Blinn-Phong)
+	float3 halfwayDir = normalize(dirToLight + viewDir);
+	float specFactor = pow(max(dot(viewDir, halfwayDir), 0.0), specPower);
+	float4 spec = float4(lightColor, 1) * specFactor * attenuation * specIntensity;
+	
+	return diffuse + spec;
+};
+
+float4 CalcPixelLight(float4 diffuseColor, float4 worldPos, float3 normal)
+{
+	float3 viewDir = normalize(viewPos - worldPos);
+
+	// ambient
+	float4 ambient = float4(ambientColor, 1) * diffuseColor;
+
+	// dir light
+	float4 dirLight = CalcLight(diffuseColor, dirLightDir, viewDir, normal, dirLightColor, specularPower, specularIntensity, 1);
+
+	// point light
+	float3 pointLightDir = worldPos - pointLightPos;
+	float distance = length(pointLightDir);
+    float attenuation = CalcAttenuation(distance);
+	float4 pointLight = CalcLight(diffuseColor, pointLightDir, viewDir, normal, pointLightColor, specularPower, specularIntensity, attenuation);
+	
+	return ambient + dirLight + pointLight;
+};
\ No newline at end of file